Source: http://www.google.com/patents/US4641204?dq=5,867,764
Timestamp: 2014-03-14 23:27:55
Document Index: 493757406

Matched Legal Cases: ['art 35', 'art 36', 'art 36', 'art 35', 'art 35', 'art 36', 'art 35', 'art 36', 'art 35']

Patent US4641204 - Recording and reproducing system for recording both analogue and digital ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA recording and reproducing system records and reproduces signals on and from a disc, so that information signals including one of first and second system composite video signals are subjected to an analog modulation and recorded on analog recorded track turns on the disc, and digital signals made up...http://www.google.com/patents/US4641204?utm_source=gb-gplus-sharePatent US4641204 - Recording and reproducing system for recording both analogue and digital information on and from a discAdvanced Patent SearchPublication numberUS4641204 APublication typeGrantApplication numberUS 06/640,757Publication dateFeb 3, 1987Filing dateAug 14, 1984Priority dateAug 19, 1983Fee statusLapsedPublication number06640757, 640757, US 4641204 A, US 4641204A, US-A-4641204, US4641204 A, US4641204AInventorsHiroyuki SugiyamaOriginal AssigneeVictor Company Of Japan, Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (2), Referenced by (38), Classifications (16), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetRecording and reproducing system for recording both analogue and digital information on and from a discUS 4641204 AAbstract A recording and reproducing system records and reproduces signals on and from a disc, so that information signals including one of first and second system composite video signals are subjected to an analog modulation and recorded on analog recorded track turns on the disc, and digital signals made up of digital data or the like obtained by subjecting information signals to a digital modulation are recorded on digital recorded track turns on the disc. The digital signals are recorded on the digital recorded track turns on the disc with a predetermined transmission frequency, so that the digital signals are reproduced from the digital recorded track turns on the disc with an approximately constant transmission frequency when a first system disc recorded with the first system composite video signal is played on a reproducing apparatus primarily designed for playing a second system disc recorded with the second system composite video signal and when the second system disc is played on a reproducing apparatus primarily designed to play the first system disc.
What is claimed is: 1. A recording and reproducing system for recording and reproducing signals on and from a rotary recording medium which is recorded with composite video signal of a predetermined television signal so that the rotary recording medium is compatibly playable on a reproducing apparatus which is primarily designed to play a rotary recording medium which is recorded with a composite video signal of another television system, said recording and reproducing system comprising:recording means for recording signals on the rotary recording medium by forming analog recorded track turns and digital recorded track turns on the same surface of the rotary recording medium, said analog recorded track turns being recorded with a modulated signal, said modulated signal being a first information signal which at least includes the composite video signal of said predetermined television system and is subjected to an analog modulation, said digital recorded track turns being recorded with digital signals which are time-sequentially multiplexed in terms of blocks with a predetermined transmission frequency, each block of said digital signals at least including modulated digital data, said modulated digital data being a second information signal which is subjected to a digital modulation, said predetermined transmission frequency being selected so that a transmission frequency of the digital signals reproduced from said rotary recording horizontal synchronizing signal is reproduced from said rotary recording medium with the same frequency as a horizontal scanning frequency of said other television system; reproducing means for picking up and reproducing recorded signals from the track turns of said rotary recording medium; a first reproducing circuit for reproducing said first information signal from a reproduced signal which is received from said reproducing means; a second reproducing circuit for reproducing said second information signal from the reproduced signal which is received from the reproducing means; a master clock signal generating circuit for supplying to said second reproducing circuit a master clock signal having a constant frequency; and a control circuit for controlling a motor which rotates said rotary recording medium, responsive to a signal obtained from a part of said master clock signal generating circuit, so that a horizontal scanning frequency of the composite video signal is reproduced from said rotary recording medium with the horizontal scanning frequency of said other television system. 2. A recording and reproducing system as claimed in claim 1 in which said control circuit comprises switching means for switching the rotational speed of said motor so that the horizontal scanning frequency of the composite video signal is reproduced from said rotary recording medium with the horizontal scanning frequency of said predetermined television system.
BACKGROUND OF THE INVENTION The present invention generally relates to recording and reproducing systems for recording and reproducing signals on and from a first system rotary recording medium so that the first system rotary recording medium is compatibly playable on a reproducing apparatus which is primarily designed to play a second system rotary recording medium. A rotary recording medium has first kind of track turns which are recorded with analog signals mainly comprising a composite video signal of a first television system which employs 625 scanning lines and a field frequency of 50 Hz or a composite video signal of a second television system which employs 525 scanning lines and a field frequency of 59.94 Hz, and a second kind of track turns which are recorded with digital signals made up of audio information and/or still picture information, and the first and second kinds of track turns coexist on the same surface of the rotary recording medium. More particularly, the present invention relates to a recording and reproducing system for recording and reproducing such signals on the rotary recording medium so that the rotary recording medium is compatibly playable on a reproducing apparatus of a television system employing a horizontal synchronizing signal frequency which is different from the horizontal synchronizing signal frequency of the recorded signals on the rotary recording medium which is being played.
For example, a first system disc is recorded with a composite video signal of a first television system employing 625 scanning lines and a field frequency of 50 Hz, on the analog recorded track turns thereof, at a rate of four fields per revolution of the disc. This first system disc is recorded with 3528 (=44.100.times.10.sup.3 digital signals with a transmission frequency of 44.100 kHz on the digital recorded track turns thereof. Normally, the recorded signals are reproduced from this first system disc by rotating this first system disc at a rotational speed of 750 rpm.
However, when the recorded horizontal synchronizing signal having a frequency of 15.625 kHz is to be reproduced from the first system disc, at a horizontal synchronizing signal frequency of 15.734 kHz of a second system which employs 525 scanning lines and a field frequency of 59.94 Hz, that is, when the first system disc is to be compatibly played on a reproducing apparatus which is primarily designed for a second system disc, the first system disc is rotated at a rotational speed of 755.2 rpm which is approximately 0.7% faster than the original rotational speed of 750 rpm. As a result, the recorded digital signals are also not reproduced at the original transmission frequency of 44.100 kHz, but are reproduced at a transmission frequency of 44.408 (=44.1.times.15.734 Similarly, when compatibly playing the second system disc on a reproducing apparatus which is primarily designed for the first system disc, the recorded digital signals are reproduced from the digital recorded track turns on the second system disc at a transmission frequency which is different from the original transmission frequency. On the other hand, the frequency of a master clock signal for a digital signal demodulating circuit which demodulates the digital signals which are reproduced from the digital recorded track turns on the disc so as to demodulate the reproduced digital signals into the original four channels of audio signals or a still picture signal, is selected to a predetermined number (for example, 140) times the transmission frequency with which the digital signals are reproduced from the digital recorded track turns on the disc.
SUMMARY OF THE INVENTION Accordingly, it is a general object of the present invention to provide a novel and useful recording and reproducing system for recording and reproducing signals on and from a first system disc so that the first system disc is compatibly playable on a reproducing apparatus which is primarily designed to play a second system disc, in which the problems described heretofore are eliminated.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a systematic block diagram showing an embodiment of a recording system of the recording and reproducing system according to the present invention;
DETAILED DESCRIPTION In FIG. 1, four channels of digital data are applied to input terminals 11, 12, 13, and 14. The four channels of digital data are made up of digital data which are obtained by subjecting audio signals to a digital modulation (pulse code modulation or PCM, for example) and/or component coded data which are obtained by subjecting a one frame (or one field) of video signal which is related to a still picture to a PCM, for example, which video signal has a field frequency of 50 Hz and 625 scanning lines. The four channels of digital data applied to the input terminals 11, 12, 13, and 14, are supplied to a digital signal processing circuit 15. The four channels of digital data have a sampling frequency of 43.75 kHz and a quantization number of 16 bits (one word).
In addition, P and Q in FIG.2 indicate positions of 16-bit error correcting codes. Further, CRC indicates a position of a 23-bit error detecting code. The error detecting code is a 23-bit remainder which is obtained when each of the words arranged in the positions Ch-1 through Ch-4, P, and Q of the same block are divided by a generating polynomial of X.sup.23 +X.sup.5 +X.sup.4 +X+1, for example. When the signals in the 9-th through 127-th bits of the same block are divided by the above generating polynomial during the reproduction and the remainder is zero, it is detected that there is no error in that block. Moreover, in FIG. 2, Adr indicates a multiplexing position of 1 bit of one of various kinds of address signals which are used during a random access and the like. The bits of the address signal are distributed, and 1 bit of the address signal is transmitted in one block. For example, all of the bits of the address signal are transmitted in 196 blocks (in this case, the address signal has 196 bits).
In order to reproduce the digital signals from the disc 24 on the NTSC system reproducing apparatus at the transmission frequency of 44.056 kHz which is the same as the transmission frequency with which the digital signals are reproduced from the NTSC system disc on the NTSC system reproducing apparatus, the transmission frequency of the digital signals recorded on the disc 24 are selected to 43.75 kHz which is 143/144 times the transmission frequency of 44.056 kHz of the digital signals which are recorded on the NTSC system disc. In this case, exactly 3500 (=43.75.times.10.sup.3 the digital recorded tracks on the disc 24.
In the disc 24 which will be described later on in the specification, a composite video signal having a field frequency of 50 Hz and 625 scanning lines, is recorded on analog recorded tracks at a rate of four fields per revolution of the disc 24. As described before, 3500 blocks of data are recorded on digital recorded track turns on the disc 24 per revolution of the disc 24. Hence, the 196-bit address signal described before, is recorded 17.85 (=3500
A total of 572 luminance picture element data groups in the first vertical column at the leftmost part of the screen are indicated b Y.sub.V1, and each of the picture element data are arranged in sequence from the top of the screen to the bottom of the screen. As shown in FIG. 5, a picture element data Y.sub.0 at the uppermost part of the screen is arranged in the upper 8 bits of the first word, and a picture element data Y.sub.456 at the second uppermost part of the screen is arranged in the lower 8 bits of the first word. Similarly, a picture element data Y.sub.912 is arranged in the upper 8 bits of the second word, a picture element data Y.sub.1368 is arranged in the lower 8 bits of the second word, a picture element data Y.sub.1824 is arranged in the upper 8 bits of the third word, . . . , and a picture element data Y.sub.260376 at the lowermost part of the screen is arranged in the lower 8 bits of the 286-th word. A total of 572 luminance picture element data groups in the second column from the left end of the screen are indicated b Y.sub.V2 in FIG. 4, and a total of 572 luminance picture element data groups in the third column from the left end of the screen are indicated by Y.sub.V3. Similarly, a total of 572 luminance picture element data groups in the i-th (i is an integer from 1 to 456) column from the left end of the screen are indicated by Y.sub.Vi. Each of the picture element data are arranged similarly as the above picture element data group Y.sub.V1, and the picture element data corresponding to one vertical column are transmitted by 286 words.
Further, as shown in FIG. 4, the above component coded signal has a signal format in which the signal is time-sequentially transmitted in terms of units, where one unit comprises a total of six picture element data groups, that is, four picture element data groups Y.sub.V(4j-3), Y.sub.V(4j-1), and Y.sub.V(4j) and the two kinds of digital color difference signals (R-Y).sub.Vj and (B-Y).sub.Vj.
FIG. 7 shows a frequency spectrum of the output signal of the analog signal processing circuit 19. In FIG. 7, I represents a carrier deviation band of 2.3 MHz of the frequency modulated luminance signal, f.sub.a represents a frequency of 6.1 MHz corresponding to the tip end of the synchronizing signal (synchronizing tip), f.sub.b represents a frequency of 6.6 MHz corresponding to the pedestal level, and f.sub.c represents a frequency of 7.9 MHz corresponding to the white peak. Further, II.sub.U and II.sub.L respectively represent upper and lower sidebands of the frequency modulated luminance signal, and III.sub.U and III.sub.L respectively represent upper and lower sidebands of the signal which is obtained by further frequency-modulating frequency modulated audio signals f.sub.A1 and f.sub.A2. Moreover, IV represents carriers of 3.43 MHz and 3.73 MHz of the 2-channel frequency modulated audio signals f.sub.A1 and f.sub.A2.
In addition, V represents a frequency band of the low-band-converted carrier chrominance signal which is obtained by frequency-converting the carrier chrominance signal which is separated from the color video signal applied to the input terminal 17. First sidebands which are obtained when the low-band-converted carrier chrominance signal is frequency-modulated, are represented by VI.sub.U and VI.sub.L, and second sidebands which are obtained when the low-band-converted carrier chrominance signal is frequency-modulated, are represented by VII.sub.U and VII.sub.L. In FIG. 7, the frequency spectrums of the signals which are obtained from the analog signal processing circuit 19, are indicated by solid lines.
The reference signals fp1, fp2, and fp3 described later on in the specification, are located in the unoccupied frequency band below the band VII.sub.L shown in FIG. 7. The occupying frequency bands of the reference signals fp1 through fp3 and the information signals are separated, because the reference signals fp1 through fp3 and the information signals need to be picked up from the disc by the same reproducing stylus.
Pits of only one of the reference signals fp1 and fp2 are formed at an intermediate position between center lines of adjacent track turns. Moreover, with respect to one track turn, the sides on which the reference signals fp1 and fp2 are recorded, are alternated for each track turn. In other words, the track of the first reference signal fp1 is represented by a broken line, and the track of the second reference signal fp2 is represented a by one-dot chain line in FIG. 8. Positions where the vertical synchronizing signal is recorded in each field, are represented by V.sub.1, V.sub.2, V.sub.3, . . . . Furthermore, the third reference signal fp3 is recorded for a duration of approximately 3H, for example, at the starting positions of the tracks t1, t2, t3, . . . , that is, the positions V.sub.1, V.sub.5, V.sub.9, . . . where the sides on which the reference signals fp1 and fp2 are recorded are interchanged.
The period in which the disc 24 undergoes one revolution, is equal to a period of four fields of the video signal, for example. The vertical blanking periods are recorded within recording part a, b, c, and d of the analog recorded tracks t1, t2, t3, and t4 as shown in FIG. 7. The address signals A.sub.C, A.sub.T, and A.sub.N are time-sequentially recorded in the recording parts a through d in each of the analog recorded track turns t1 through t4 on the disc 24.
On the other hand, at the same time, a plurality of microswitches (not shown) located at the innermost part of the player part 35 are turned ON and OFF depending on the combination of the existence and non-existence of cutouts located on the front end of the lid plate. As disclosed in a U.S. Pat. No. 4,419,710 in which the assignee is the same as the assignee of the present application, it is possible to detect various recorded contents on the disc, the side of the disc to be reproduced, and the like, from the ON and OFF states of the microswitches. The output signals of the microswitches, such as a disc discriminating signal which indicates whether the disc 34 is a digital audio disc or a video disc (it will be assumed that the disc recorded by the system according to the present invention is discriminated as being a video disc), are supplied to the microprocessor 41 through an input terminal 42. Hence, the microprocessor 41 serially supplies a 25-bit status signal, for example, to a pin terminal 43.sub.3 of a DIN-type 8-pin connector.
The 8-pin connector comprises pin terminals 4.sub.31 through 43.sub.8. The address data from the adapter part 36 is applied to the pin terminal 43.sub.1, and a reproduced signal (RF signal) is produced through the pin terminal 43.sub.2 as will be described hereinafter. A command signal of an external device such as a personal microcomputer having a discriminating function, is applied to the pin terminal 43.sub.4 according to the needs. The clock signal from the microprocessor 41 is produced through the pin terminal 43.sub.5. An external synchronizing signal from the adapter part 36, is applied to the pin terminal 43.sub.7. Further, the pin terminal 43.sub.8 is grounded, and the pin terminal 43.sub.6 is not used. When coupling the player part 35 to a personal microcomputer or the like, unlike in the case where the player part 35 is coupled to the adapter part 36, the address data is produced from the pin terminal 43.sub.1, the reproduced audio signal is produced through the pin terminal 43.sub.6, and the pin terminal 43.sub.7 is not used.
The status signal from the microprocessor 41 shown in FIG. 9, is produced in synchronism with the clock signal. This status signal is supplied to a status decoding circuit 45 wherein the value of the second bit of the status signal is detected, through a pin terminal 44.sub.3 of a DIN-type 8-pin connector comprising pin terminals 44.sub.1 through 44.sub.8 as shown in FIG. 11. The second bit of the status signal indicates whether the disc 34 is a digital audio disc or a video disc (the disc 24 will be detected as a video disc). The clock signal is supplied to the status decoding circuit 45 and the like, through the pin terminals 43.sub.5 and 44.sub.5. An output signal of the status decoding circuit 45 is applied to switching circuits 46 and 47 as a switching signal. When the digital audio disc is being played, the switching circuits 46 and 47 are connected to respective terminals A in response to this switching signal. On the other hand, when the video disc or the disc 24 on which the analog recorded track turns and the digital recorded track turns coexist is being played, the switching circuits 46 and 47 are connected to respective terminals V in response to the switching signal from the status decoding circuit 45.
The phase comparator 52 constitutes a known phase locked loop (PLL) together with a voltage controlled oscillator (VCO) 53 and a frequency divider 54. An output signal of the VCO 53 is supplied to the phase comparator 52 through the frequency divider 54, and to the terminal V of the switching circuit 46. When playing the disc 24, the switching circuits 46 and 47 are respectively controlled to selectively pass the signals supplied to the respective terminals V, as described before. Thus, in this case, the output signal of the VCO 53 is obtained from the switching circuit 46, and is supplied to a digital signal demodulating circuit 56 as a master clock signal. At the same time, the output signal of the frequency divider 51 having the horizontal scanning frequency of 15.734 kHz, is obtained from the switching circuit 47. The signal obtained from the switching circuit 47 is passed through the pin terminals 44.sub.7 and 43.sub.7, and is supplied to a switching circuit 57 within the player part 35 as a motor rotation synchronizing signal.
As described before, the NTSC system reproducing apparatus is primarily designed to play the NTSC system (second system) disc which is recorded with the NTSC color video signal on the analog recorded track turns thereof and with the digital signals having the transmission frequency of 44.056 kHz on the digital recorded track turns thereof. Since the NTSC system reproducing apparatus reproduces the digital signals from the NTSC system disc with the transmission frequency of 44.056 kHz which is the same as the transmission frequency with which the digital signals are recorded at the time of the recording, the frequency dividing ratio of the frequency divider 54 is selected to 1/392. Hence, a signal having a frequency of 6.1678 MHz (=44.056 kHz 53, and is supplied to the digital signal demodulating circuit 56 as the master clock signal, through the switching circuit 46. On the other hand, the composite video signal of the PAL system or the SECAM system employing 625 scanning lines is converted into a predetermined signal format and recorded on the analog recorded tracks on the disc 24, at a rate of four fields per revolution of the disc 24. 3500 blocks of the digital signals are recorded on the digital recorded track turns on the disc 24 per revolution of the disc 24, with the transmission frequency of 43.75 kHz.
According to the present embodiment, the disc 24 is played on the NTSC system reproducing apparatus so that the reproduced signals from the disc 24 can be reproduced and displayed satisfactorily on the NTSC system monitoring reproducing apparatus. The rotational speed of the motor 38 is controlled so that the horizontal scanning frequency which is recorded with the frequency of 15.625 kHz at the time of the recording, is reproduced with the NTSC system horizontal frequency of 15.734 kHz which is 144/143 times the frequency of 15.625 kHz. Thus, the disc 24 is not rotated at the rotational speed of 750 rpm, but is rotated at a rotational speed of 755.24 (=750 frequency of the digital signals which are reproduced from the disc 24, is not 43.75 kHz but is equal to 44.056 (=43.75.times.(144/143)) kHz. Therefore, even when the NTSC system reproducing apparatus compatibly plays the disc 24, the frequency of the master clock signal which is required in the digital signal demodulating circuit 56 is equal to 6.1678 MHz which is the same as the master clock signal frequency used when playing the NTSC system disc. For this reason, the frequency dividing ratio of the frequency divider 54 need not be made variable, and the same PLL can be used to obtain the master clock signal. The switching circuit 57 is designed to selectively produce the signal having the horizontal scanning frequency f.sub.H when this signal is applied to the pin terminal 43.sub.7, and to selectively produce the signal which is produced from an oscillator 58 and has the horizontal scanning frequency f.sub.H when no signal is applied to the pin terminal 43.sub.7.
The signal which is applied to the pin terminal 43.sub.7 and is produced from the switching circuit 57, is frequency-divided by 1/21 in a frequency divider 59. A frequency divided output of the frequency divider 59 is supplied to a terminal N of a switching circuit 61, and to a frequency divider 60 wherein the signal is frequency-divided by 1/25. A frequency divided output of the frequency divider 60 is supplied to a terminal P of the switching circuit 61. The switching of the switching circuit 61 is controlled responsive to the signal applied to the input terminal 42. The switching circuit 61 is connected to the terminal P when the disc 24 is to be played, and is connected to the terminal N when NTSC system (second system) disc or the video disc is to be played. An output signal of the switching circuit 61 is supplied to a comparator 62, as a reference signal for the servo circuit which controls the motor 38. The comparator 62 compares the phase of an output pulse signal of a magnetic detector 63 with the phase of the reference signal which is obtained from the switching circuit 61.
Further, the reproduced signal from the pickup circuit 69 is supplied to a demodulator 72 within the adapter part 36, through the pin terminals 43.sub.2 and 44.sub.2. The demodulator 72 frequency-demodulates the reproduced signal, and supplies a demodulated signal to a vertical synchronizing signal detecting circuit 73, an address data write-in circuit 74, and the digital signal demodulating circuit 56. As described before, the master clock signal obtained from the switching circuit 46 and having the frequency of 6.1678 MHz, is supplied to the digital signal demodulating circuit 56, and the digital signal demodulating circuit 56 detects the existence of an error by use of the error detecting code CRC within the demodulated digital signal which is reproduced from the digital recorded track turns and has the signal format shown in FIG. 2. When it is detected that the error does exist within the demodulated digital signal, the digital signal demodulating circuit 56 corrects the error by use of the error correcting codes P and Q. Further, the digital signal demodulating circuit 56 supplies the digital audio signals which are transmitted in the positions Ch-1 through Ch-4 shown in FIG. 2, to a digital-to-analog (D-A) converter and switching device 75. On the other hand, in the case where the digital video signal is transmitted in at least one of the positions Ch-3 and Ch-4 shown in FIG. 2, the digital signal demodulating circuit 56 supplies the digital video signal to a still picture decoder 76. The D-A converter and switching device 75 subjects the digital audio signals to a digital-to-analog conversion, and is switched and controlled in response to an output of an address data write-in circuit 77.
Accordingly, the output address data of the address data write-in circuit 74 is obtained from the switching circuit 79 while the analog recorded track turn is being reproduced. On the other hand, the output address data of the address data write-in circuit 77 is obtained from the switching circuit 79 while the digital recorded track turn is being reproduced. The reproduced address data obtained from the switching circuit 79, is supplied to the command processor 40 and the microprocessor 41 within the player part 35, through the pin terminals 44.sub.1 and 43.sub.1. The command processor 40 constantly displays the position of the reproducing stylus 65 with the address data which is designated. The microprocessor 41 produces various kinds of signals based on the signals from the input device 39 and the input address data, and supplies the various kinds of signals to the feed mechanism 64. For example, during a random access, the reproducing stylus 65 is moved at a high speed to the track position having the address which is designated by the input device 39.
In a case where the disc 34 is the conventional digital audio disc (fifth disc) comprising solely of the digital recorded track turns, the switching circuits 46 and 47 are connected to the respective terminals A in response to the output signal of the status decoding circuit 45. In this case, the output signal of the oscillator 49 having the frequency of 6.174 MHz, is produced from the switching circuit 46 and is supplied to the digital signal demodulating circuit 56 as the master clock signal. In addition, the output signal of the frequency divider 50 having the frequency of 15.75 kHz, is produced from the switching circuit 47 and is supplied to the frequency dividers 59 and 60 as the motor rotation synchronizing signal, through the pin terminals 44.sub.7 and 43.sub.7 and the switching circuit 57.
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H04N5/903, H04N9/80Cooperative ClassificationH04N1/2166, H04N9/8066European ClassificationH04N1/21C, H04N9/806S2Legal EventsDateCodeEventDescriptionFeb 5, 1995LAPSLapse for failure to pay maintenance feesSep 13, 1994REMIMaintenance fee reminder mailedJul 27, 1990FPAYFee paymentYear of fee payment: 4Aug 14, 1984ASAssignmentOwner name: VICTOR COMPANY OF JAPAN, LTD., NO. 12, 3-CHOME, MOFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SUGIYAMA, HIROYUKI;REEL/FRAME:004299/0445Effective date: 19840731Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SUGIYAMA, HIROYUKI;REEL/FRAME:004299/0445Owner name: VICTOR COMPANY OF JAPAN, LTD., JAPANRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google