IN THE UNITED STATES DISTRICT COURT 

FOR THE WESTERN DISTRICT OF TEXAS 

WACO DIVISION 

DROPBOX, INC., 

Plaintiff/Counter-Defendant, 

v. 

MOTION OFFENSE, LLC, 

Defendant/Counter-Plaintiff.

Civil Action No. 6:20-cv-00251-ADA 

PLAINTIFF/COUNTER-DEFENDANT DROPBOX, INC.’S AMENDED RESPONSES 

TO DEFENDANT/COUNTER-PLAINTIFF MOTION OFFENSE’S COUNTERCLAIMS 

Case 6:20-cv-00251-ADA Document 94 Filed 07/02/21 Page 1 of 15
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Dropbox, Inc. (“Plaintiff” or “Counter-Defendant” or “Dropbox”) hereby provides 

Plaintiff’s Amended Answer to Motion Offense, LLC’s (“Defendant” or “Counter-Plaintiff” or 

“Motion Offense”) Counterclaims to Plaintiff’s First Amended Complaint (“Counterclaims”) as 

follows: 

NATURE OF THE ACTION1

1. Dropbox admits that the Counterclaims purport to state causes of action under the 

patent laws of the United States, 35 U.S.C. § 1 et seq. 

THE PARTIES 

2. Dropbox lacks knowledge or information sufficient to form a belief about the truth 

of the allegations in Paragraph 2, and therefore denies them. 

3. Dropbox admits that Dropbox is a Delaware corporation. Dropbox denies that its 

principal place of business is at 333 Brannan Street, San Francisco, CA. Dropbox’s principal place 

of business is located at 1800 Owens Street, San Francisco, CA.

JURISDICTION AND VENUE 

4. Paragraph 4 states conclusions of law for which no answer is required. To the 

extent a response is deemed to be required, based on its investigation to date, Dropbox admits that 

this Court has subject matter jurisdiction pursuant 28 U.S.C. §§ 1331, 1338(a), 2201, and 2202. 

5. Paragraph 5 states conclusions of law for which no answer is required. To the 

extent a response is deemed to be required, Dropbox admits that this case was transferred to this 

District from the District Court for the District of Delaware. 

 

1

 For ease of reference, Dropbox utilizes the headings used in Motion Offense’s Answer and 

Counterclaims. In doing so, Dropbox does not admit to any of the allegations contained in those 

headings. In addition, Dropbox’s responses to Motion Offense’s allegations correspond to the 

numbered paragraphs in the Counterclaims. 

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6. Paragraph 6 states conclusions of law for which no answer is required. To the 

extent a response is deemed to be required, Dropbox denies that it has committed any acts of patent 

infringement. 

7. Paragraph 7 states conclusions of law for which no answer is required. To the 

extent a response is deemed to be required, Dropbox admits that it is registered to do business in 

Texas. Dropbox also admits that it maintains an office in Austin. 

FIRST COUNTERCLAIM – INFRINGEMENT OF U.S. PATENT NO. 10,013,158

8. Paragraph 8 of the Counterclaims requires no response. 

9. Dropbox admits Exhibit A to the Counterclaims purports on its face to be U.S. 

Patent No. 10,013,158 (referred to herein as the ʼ158 patent), and to have the inventor, application 

number, filing date, title, and issue date as alleged. Dropbox lacks knowledge or information 

sufficient to form a belief as to the truth of the remaining allegations contained in Paragraph 9, and 

on that basis denies them. 

10. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 10, and on that basis denies them. To the extent 

Paragraph 10 alleges that Dropbox has committed or is committing any acts of patent infringement, 

Dropbox denies that allegation. 

11. Dropbox admits that Exhibit A purports on its face to be a copy of the ʼ158 patent. 

Dropbox denies the remaining allegations in Paragraph 11. 

12. Dropbox admits that Paragraph 12 purports to quote a portion of the ʼ158 patent. 

Dropbox denies the remaining allegations in Paragraph 12. 

13. Dropbox admits that Paragraph 13 purports to quote portions of the ʼ158 patent. 

Dropbox denies the remaining allegations in Paragraph 13. 

14. Dropbox denies all allegations in Paragraph 14. 

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15. Dropbox denies all allegations in Paragraph 15. 

16. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 16, and on that basis denies them. 

17. Dropbox denies all allegations in Paragraph 17. 

18. Dropbox admits Exhibit A to the Counterclaims purports to have 30 claims. 

Dropbox denies the remaining allegations in Paragraph 18. 

19. Dropbox denies all allegations in Paragraph 19. 

20. Dropbox denies all allegations in Paragraph 20. 

21. Dropbox denies all allegations in Paragraph 21. 

22. Dropbox denies all allegations in Paragraph 22. 

23. Dropbox admits that it had knowledge of existence of the ʼ158 patent as of the filing 

of the complaint in 1:19-cv-01521 (D. Del.) on August 14, 2019. Dropbox denies the remaining 

allegations in Paragraph 23. 

24. Dropbox denies all allegations in Paragraph 24. 

25. Dropbox admits that it had knowledge of existence of the ʼ158 patent as of the filing 

of the complaint in 1:19-cv-01521 (D. Del.) on August 14, 2019. Dropbox denies the remaining 

allegations in Paragraph 25. 

26. Dropbox denies all allegations in Paragraph 26. 

27. Dropbox denies all allegations in Paragraph 27. 

SECOND COUNTERCLAIM – INFRINGEMENT OF U.S. PATENT NO. 10,021,052 

28. Paragraph 28 of the Counterclaims requires no response. 

29. Dropbox admits Exhibit B to the Counterclaims purports on its face to be U.S. 

Patent No. 10,021,052 (referred to herein as the ʼ052 patent), and to have the inventor, application 

number, filing date, title, and issue date as alleged. Dropbox lacks knowledge or information 

Case 6:20-cv-00251-ADA Document 94 Filed 07/02/21 Page 4 of 15
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sufficient to form a belief as to the truth of the remaining allegations contained in Paragraph 29, 

and on that basis denies them. 

30. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 30, and on that basis denies them. To the extent 

Paragraph 30 alleges that Dropbox has committed or is committing any acts of patent infringement, 

Dropbox denies that allegation. 

31. Dropbox admits that Exhibit B purports on its face to be a copy of the ʼ052 patent. 

Dropbox denies the remaining allegations in Paragraph 31. 

32. Dropbox admits that Paragraph 32 purports to quote a portion of the ʼ052 patent. 

Dropbox denies the remaining allegations in Paragraph 32. 

33. Dropbox admits that Paragraph 33 purports to quote portions of the ʼ052 patent. 

Dropbox denies the remaining allegations in Paragraph 33. 

34. Dropbox denies all allegations in Paragraph 34. 

35. Dropbox denies all allegations in Paragraph 35. 

36. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 36, and on that basis denies them. 

37. Dropbox denies all allegations in Paragraph 37. 

38. Dropbox admits Exhibit B to the Counterclaims purports to have 30 claims. 

Dropbox denies the remaining allegations in Paragraph 38. 

39. Dropbox denies all allegations in Paragraph 39. 

40. Dropbox denies all allegations in Paragraph 40. 

41. Paragraph 41 of the Counterclaims requires no response. 

42. Dropbox denies all allegations in Paragraph 42. 

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43. Dropbox denies all allegations in Paragraph 43. 

44. Dropbox admits that it had knowledge of existence of the ʼ052 patent as of the 

filing of the complaint in 1:19-cv-01521 (D. Del.) on August 14, 2019. Dropbox denies the 

remaining allegations in Paragraph 44. 

45. Dropbox denies all allegations in Paragraph 45. 

46. Dropbox admits that it had knowledge of existence of the ʼ052 patent as of the filing 

of the complaint in 1:19-cv-10521 (D. Del.) on August 14, 2019. Dropbox denies the remaining 

allegations in Paragraph 46. 

47. Dropbox denies all allegations in Paragraph 47. 

48. Dropbox denies all allegations in Paragraph 48. 

THIRD COUNTERCLAIM – INFRINGEMENT OF U.S. PATENT NO. 10,303,353

49. Paragraph 49 of the Counterclaims requires no response. 

50. Dropbox admits Exhibit C to the Counterclaims purports on its face to be U.S. 

Patent No. 10,303,353 (referred to herein as the ʼ353 patent), and to have the inventor, application 

number, filing date, title, and issue date as alleged. Dropbox lacks knowledge or information 

sufficient to form a belief as to the truth of the remaining allegations contained in Paragraph 50, 

and on that basis denies them. 

51. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 51, and on that basis denies them. To the extent 

Paragraph 51 alleges that Dropbox has committed or is committing any acts of patent infringement, 

Dropbox denies that allegation. 

52. Dropbox admits that Exhibit C purports on its face to be a copy of the ʼ353 patent. 

Dropbox denies the remaining allegations in Paragraph 52. 

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53. Dropbox admits that Paragraph 53 purports to quote a portion of the ʼ353 patent. 

Dropbox denies the remaining allegations in Paragraph 53. 

54. Dropbox admits that Paragraph 54 purports to quote portions of the ʼ353 patent. 

Dropbox denies the remaining allegations in Paragraph 54. 

55. Dropbox denies all allegations in Paragraph 55. 

56. Dropbox denies all allegations in Paragraph 56. 

57. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 57, and on that basis denies them. 

58. Dropbox denies all allegations in Paragraph 58. 

59. Dropbox admits Exhibit C to the Counterclaims purports to have 21 claims. 

Dropbox denies the remaining allegations in Paragraph 59. 

60. Dropbox denies all allegations in Paragraph 60. 

61. Dropbox denies all allegations in Paragraph 61. 

62. Dropbox denies all allegations in Paragraph 62. 

63. Dropbox denies all allegations in Paragraph 63. 

64. Dropbox denies all allegations in Paragraph 64. 

65. Dropbox denies all allegations in Paragraph 65. 

66. Dropbox denies all allegations in Paragraph 66. 

67. Dropbox denies all allegations in Paragraph 67. 

68. Dropbox denies all allegations in Paragraph 68. 

FOURTH COUNTERCLAIM – INFRINGEMENT OF U.S. PATENT NO. 10,613,737 

69. Paragraph 69 of the Counterclaims requires no response. 

70. Dropbox admits Exhibit D to the Counterclaims purports on its face to be U.S. 

Patent No. 10,613,737 (referred to herein as the ʼ737 patent), and to have the inventor, application 

Case 6:20-cv-00251-ADA Document 94 Filed 07/02/21 Page 7 of 15
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number, filing date, title, and issue date as alleged. Dropbox lacks knowledge or information 

sufficient to form a belief as to the truth of the remaining allegations contained in Paragraph 70, 

and on that basis denies them. 

71. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 71, and on that basis denies them. To the extent 

Paragraph 71 alleges that Dropbox has committed or is committing any acts of patent infringement, 

Dropbox denies that allegation. 

72. Dropbox admits that Exhibit D purports on its face to be a copy of the ʼ737 patent. 

Dropbox denies the remaining allegations in Paragraph 72. 

73. Dropbox admits that Paragraph 73 purports to quote a portion of the ʼ737 patent. 

Dropbox denies the remaining allegations in Paragraph 73. 

74. Dropbox admits that Paragraph 74 purports to quote portions of the ʼ737 patent. 

Dropbox denies the remaining allegations in Paragraph 74. 

75. Dropbox denies all allegations in Paragraph 75. 

76. Dropbox denies all allegations in Paragraph 76. 

77. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 77, and on that basis denies them. 

78. Dropbox denies all allegations in Paragraph 78. 

79. Dropbox admits Exhibit D to the Counterclaims purports to have 40 claims. 

Dropbox denies the remaining allegations in Paragraph 79. 

80. Dropbox denies all allegations in Paragraph 80. 

81. Dropbox denies all allegations in Paragraph 81. 

82. Dropbox denies all allegations in Paragraph 82. 

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83. Dropbox denies all allegations in Paragraph 83. 

84. Dropbox denies all allegations in Paragraph 84. 

85. Dropbox denies all allegations in Paragraph 85. 

86. Dropbox denies all allegations in Paragraph 86. 

87. Dropbox denies all allegations in Paragraph 87. 

88. Dropbox denies all allegations in Paragraph 88. 

FIFTH COUNTERCLAIM – INFRINGEMENT OF U.S. PATENT NO. 10,587,548

89. Paragraph 89 of the Counterclaims requires no response. 

90. Dropbox admits Exhibit E to the Counterclaims purports on its face to be U.S. 

Patent No. 10,587,548 (referred to herein as the ʼ548 patent), and to have the inventor, application 

number, filing date, title, and issue date as alleged. Dropbox lacks knowledge or information 

sufficient to form a belief as to the truth of the remaining allegations contained in Paragraph 90, 

and on that basis denies them. 

91. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 91, and on that basis denies them. To the extent 

Paragraph 91 alleges that Dropbox has committed or is committing any acts of patent infringement, 

Dropbox denies that allegation. 

92. Dropbox admits that Exhibit E purports on its face to be a copy of the ʼ548 patent. 

Dropbox denies the remaining allegations in Paragraph 92. 

93. Dropbox admits that Paragraph 93 purports to quote a portion of the ʼ548 patent. 

Dropbox denies the remaining allegations in Paragraph 93. 

94. Dropbox admits that Paragraph 94 purports to quote portions of the ʼ548 patent. 

Dropbox denies the remaining allegations in Paragraph 94. 

95. Dropbox denies all allegations in Paragraph 95. 

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96. Dropbox denies all allegations in Paragraph 96. 

97. Dropbox lacks knowledge or information sufficient to form a belief as to the truth 

of the allegations contained in Paragraph 97, and on that basis denies them. 

98. Dropbox denies all allegations in Paragraph 98. 

99. Dropbox admits Exhibit E to the Counterclaims purports to have 46 claims. 

Dropbox denies the remaining allegations in Paragraph 99. 

100. Dropbox denies all allegations in Paragraph 100. 

101. Dropbox denies all allegations in Paragraph 101. 

102. Dropbox denies all allegations in Paragraph 102. 

103. Dropbox denies all allegations in Paragraph 103. 

104. Dropbox denies all allegations in Paragraph 104. 

105. Dropbox denies all allegations in Paragraph 105. 

106. Dropbox denies all allegations in Paragraph 106. 

107. Dropbox denies all allegations in Paragraph 107. 

108. Dropbox denies all allegations in Paragraph 108. 

JURY DEMAND 

Pursuant to Rule 38 of the Federal Rules of Civil Procedure, Dropbox demands a trial by 

jury on all issues triable as such. 

PRAYER FOR RELIEF 

Dropbox denies subparagraphs A–E of Motion Offense’s Prayer For Relief; Dropbox 

denies that Motion Offense is entitled to any relief from Dropbox. 

Dropbox denies any and all Affirmative Defenses raised by Motion Offense. 

Dropbox denies all allegations of Motion Offense’s Counterclaims not specifically 

admitted above. 

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AMENDED AFFIRMATIVE DEFENSES TO THE COUNTERCLAIMS 

By alleging the amended Defenses set forth below, Dropbox does not agree or concede that 

it bears the burden of proof or the burden of persuasion on any of these issues, whether in whole 

or in part. For its amended Defenses to Motion Offense’s Counterclaims, Dropbox alleges as 

follows: 

First Affirmative Defense 

(Non-Infringement) 

1. Dropbox does not make, use, sell, offer for sale, or import into the United States, and has 

not made, used, sold, offered for sale or imported into the United States, any products or methods 

that infringe any valid claim of the patents asserted in the Counterclaims, either directly, 

indirectly, contributorily, through the doctrine of equivalents, or otherwise, and has not induced 

others to infringe, or otherwise indirectly infringed, any valid claim of the patents asserted in the 

Counterclaims. 

Second Affirmative Defense 

(Invalidity) 

2. One or more claims of the patents asserted in the Counterclaims are invalid for failure to 

meet the conditions of patentability and/or otherwise comply with one or more provisions of 35 

U.S.C. §§ 101 et seq., including 35 U.S.C. §§ 101, 102, 103, 112, and/or 116. 

Third Affirmative Defense 

(Failure to Provide Notice Pursuant to 35 U.S.C. § 287) 

3. On information and belief, to the extent Motion Offense, its predecessors, or licensees of 

the patents asserted in the Counterclaims have failed to comply with the marking requirement set 

forth in 35 U.S.C. § 287, Motion Offense’s damages are barred, in whole or in part. 

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Fourth Affirmative Defense 

(Waiver, Estoppel, Acquiescence, Unclean Hands, and Implied License) 

4. On information and belief, Motion Offense’s claims for relief are barred in whole or in 

part by waiver, estoppel, acquiescence, unclean hands, and/or implied license. 

Fifth Affirmative Defense 

(Prosecution History Estoppel) 

5. Motion Offense is estopped, based on statements, representations, and admissions made 

during prosecution of the patent applications that led to the patents asserted in the Counterclaims, 

from asserting that the claims of the patents asserted in the Counterclaims are infringed by 

Dropbox or Dropbox’s products or services, either directly, indirectly, contributorily, through the 

doctrine of equivalents, or otherwise. 

Sixth Affirmative Defense 

(No Immediate or Irreparable Injury) 

6. On information and belief, Motion Offense is not entitled to equitable relief with respect 

to the patents asserted in the Counterclaims under any theory because Motion Offense has not 

and will not suffer irreparable harm, Motion Offense does not practice the patents, Motion 

Offense is not without adequate remedy at law, the balance of the hardships do not favor entry of 

an injunction, and/or public policy concerns weigh against any equitable relief. 

Seventh Affirmative Defense 

(Time Limitation) 

7. On information and belief, Motion Offense’s claims for damages are barred, in whole or 

in part, under 35 U.S.C. § 286. 

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Eighth Affirmative Defense 

(No Costs) 

8. On information and belief, Motion Offense is barred from recovering costs associated 

with this action with respect to the patents asserted in the Counterclaims under 35 U.S.C. § 288. 

Ninth Affirmative Defense 

(Failure to Conduct Pre-Suit Investigation) 

9. Motion Offense’s claims for relief are barred, and its cause of action against Dropbox is 

subject to dismissal, because Motion Offense failed to conduct a reasonable investigation of 

Dropbox’s products and/or methods of providing services prior to filing suit. 

Tenth Affirmative Defense 

(Ensnarement) 

10. To the extent that Motion Offense claims infringement under the Doctrine of Equivalents, 

Motion Offense’s claims are barred under the Ensnarement Doctrine, which prohibits Motion 

Offense from asserting an infringement theory under the Doctrine of Equivalents that 

encompasses, or “ensnares,” the prior art. 

 

Reservation of Defenses 

Dropbox reserves all affirmative defenses under Rule 8(c) of the Federal Rules of Civil 

Procedure, the Patent Laws of the United States, and any other defenses, at law or in equity, that 

may now exist or in the future be available based on discovery and further factual investigation. 

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Dated: July 2, 2021 

OF COUNSEL: 

Gregory H. Lantier (Pro Hac Vice) 

WILMER CUTLER PICKERING HALE 

& DORR LLP 

1875 Pennsylvania Avenue 

Washington DC 20006 

Tel: (202) 663-6000 

Email: gregory.lantier@wilmerhale.com 

Liv Herriot (Pro Hac Vice) 

Christine Duh (Pro Hac Vice) 

WILMER CUTLER PICKERING HALE 

& DORR LLP 

2600 El Camino Real, Suite 400 

Palo Alto, CA 94306 

Tel: (650) 858-6000 

Email: liv.herriot@wilmerhale.com 

Email: christine.duh@wilmerhale.com 

Monica Grewal (Pro Hac Vice) 

Yvonne S. Lee (Pro Hac Vice)

WILMER CUTLER PICKERING HALE 

& DORR LLP 

60 State Street 

Boston, MA 02109 

Tel: (617) 526-6000 

Email: monica.grewal@wilmerhale.com 

Email: yvonne.lee@wilmerhale.com 

Josh Furman, Ph.D. (Pro Hac Vice)

WILMER CUTLER PICKERING HALE 

& DORR LLP 

One Front Street, Suite 3500 

San Francisco, CA 94111 

Tel: (628) 235-1002 

Email: josh.furman@wilmerhale.com 

Respectfully submitted, 

/s/ J. Stephen Ravel 

J. Stephen Ravel 

Texas State Bar No. 16584975 

KELLY HART & HALLMAN LLP 

303 Colorado, Suite 2000 

Austin, TX 78701 

Tel: (512) 495-6429 

Email: steve.ravel@kellyhart.com 

Attorneys for Dropbox, Inc.

 

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CERTIFICATE OF SERVICE 

I hereby certify that all counsel of record are being served with a copy of the foregoing 

document via the Court’s CM/ECF system per Local Civil Rule CV-5(b)(1) on July 2, 2021. 

/s/ J. Stephen Ravel 

J. Stephen Ravel 

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