United States patent digest, 1979, class 355
Subtitle: photocopying.
Contributors: Boston Patent Company.
Publisher: Boston Patent Co.
Published: 1981
Place of publication: Needham Heights, Mass. (P.O. Box 55, Needham Heights 02194)
Language: eng
Number of pages: 290
Subjects: Photocopying -- Patents.; Patents -- United States.
Other titles: U.S. patent digest, 1979, class 355.
Notes: Spine title: U.S. patent digest, 1979, class 355.
Includes indexes.