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IN THE UNITED STATES DISTRICT COURT 

FOR THE WESTERN DISTRICT OF TEXAS

WACO DIVISION

WSOU INVESTMENTS, LLC d/b/a 

BRAZOS LICENSING AND 

DEVELOPMENT,

Plaintiff,

v.

MICROSOFT CORPORATION

Defendant.

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CIVIL ACTION NO. 6:20-cv-337

JURY TRIAL DEMANDED

ORIGINAL COMPLAINT FOR PATENT 

INFRINGEMENT

Plaintiff WSOU Investments, LLC d/b/a Brazos Licensing and Development (“Brazos” or 

“Plaintiff”), by and through its attorneys, files this Complaint for Patent Infringement against 

Microsoft Corporation (“Microsoft” or “Defendant”) and alleges:

NATURE OF THE ACTION

1. This is a civil action for patent infringement arising under the Patent Laws of the 

United States, 35 U.S.C. §§ 1, et seq., including §§ 271, 281, 284, and 285.

THE PARTIES

2. Brazos is a limited liability corporation organized and existing under the laws of 

Delaware, with its principal place of business at 605 Austin Avenue, Suite 6, Waco, Texas 76701.

3. On information and belief, Defendant Microsoft Corporation is incorporated under 

the laws of Washington State with its principal place of business at 1 Microsoft Way, Redmond, 

Washington 98052. Microsoft may be served with process through its registered agent Corporation 

Service Company, 211 East 7th Street, Suite 620, Austin, Texas 78701.

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 1 of 11
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4. On information and belief, Microsoft has been registered to do business in the state 

of Texas under Texas SOS file number 0010404606 since about March 1987.

5. On information and belief, Microsoft has had regular and established places of 

business in this judicial district since at least 2002.

JURISDICTION AND VENUE

6. This is an action for patent infringement which arises under the Patent Laws of the 

United States, in particular, 35 U.S.C. §§ 271, 281, 284, and 285.

7. This Court has jurisdiction over the subject matter of this action under 28 U.S.C.

§§ 1331 and 1338(a).

8. This Court has specific and general personal jurisdiction over Microsoft pursuant 

to due process and/or the Texas Long Arm Statute, because Microsoft has committed acts giving 

rise to this action within Texas and within this judicial district. The Court’s exercise of jurisdiction 

over Microsoft would not offend traditional notions of fair play and substantial justice because 

Microsoft has established minimum contacts with the forum. For example, on information and 

belief, Microsoft has committed acts of infringement in this judicial district, by among other things, 

selling and offering for sale products that infringe the asserted patent, directly or through 

intermediaries, as alleged herein.

9. Venue in the Western District of Texas is proper pursuant to 28 U.S.C. §§1391

and/or 1400(b). 

10. This district was deemed to be a proper venue for patent cases against Microsoft in 

actions bearing docket numbers: 6-19-cv-00572 (Zeroclick, LLC v. Microsoft Corporation ); 6-19-

cv-00687 (Exafer, Ltd. v. Microsoft Corporation.); and 6-19-cv-00399 (Neodron Ltd. v. Microsoft 

Corporation).

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 2 of 11
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11. On information and belief, Microsoft maintains a variety of regular and established 

business locations in the judicial district including its Corporate Sales Office Locations, Retail 

Store Locations, and Datacenter Locations.

12. On information and belief, Microsoft operates multiple corporate sales offices in 

the judicial district, and these offices constitute regular and established places of business.

13. On information and belief, Microsoft employs hundreds of employees within its 

corporate sales offices located in the judicial district.

14. On information and belief, Microsoft has an established place of business in this 

judicial district known as “Corporate Sales Office: Austin” located at 10900 Stonelake Boulevard, 

Suite 225, Austin, Texas 78759 and “Microsoft Retail Store: The Domain” located at 3309 

Esperanza Crossing, Suite 104 Austin, Texas 78758. 

https://www.microsoft.com/en-us/about/officelocator?Location=78759

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 3 of 11
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15. On information and belief, Microsoft’s “Corporate Sales Office: Austin” and 

“Microsoft Retail Store: The Domain” locations were respectively assessed by the Travis County 

Appraisal District in 2019 to have market values of over $2.3 million dollars and $2.7 million 

dollars.

http://propaccess.traviscad.org/clientdb/SearchResults.aspx

16. On information and belief, Microsoft has another established place of business in 

this judicial district known as “Corporate Sales Office: San Antonio” located at Concord Park II, 

401 East Sonterra Boulevard, Suite 300, San Antonio, Texas 78258.

Source: Google Maps

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 4 of 11
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17. On information and belief, Microsoft owns and operates multiple datacenters in the 

judicial district, including without limitation data centers located at 5150 Rogers Road, San 

Antonio, Texas 78251; 5200 Rogers Road, San Antonio, Texas 78251; 3823 Weisman Boulevard, 

San Antonio, Texas 78251; and 15000 Lambda Drive, San Antonio, Texas 782245. 

18. On information and belief, Microsoft utilizes its datacenter locationsin this judicial 

district as regular and established places of business. As a non-limiting example, the data centers 

in San Antonio are referred to within Microsoft as “US Gov Texas.” 

19. On information and belief, thousands of customers who rely on the infringing 

datacenter infrastructure that Microsoft’s engineering and operations teams have built, reside in 

this judicial district.

COUNT ONE - INFRINGEMENT OF 

U.S. PATENT NO. 7,750,286

20. Brazos re-alleges and incorporates by reference the preceding paragraphs of this 

Complaint.

21. On July 6, 2010, the United States Patent and Trademark Office duly and legally 

issued U.S. Patent No. 7,750,286 (“the ’286 Patent”), entitled “Compact Image Projector Having 

a Mirror for Reflecting a Beam Received From a Polarization Beam Splitter Back to the 

Polarization Beam Splitter.” A true and correct copy of the ’286 Patent is attached as Exhibit A to 

this Complaint.

22. Brazos is the owner of all rights, title, and interest in and to the ’286 Patent, 

including the right to assert all causes of action arising under the ’286 Patent and the right to any 

remedies for the infringement of the ’286 Patent.

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 5 of 11
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23. Microsoft makes, uses, sells, offers for sale, imports, and/or distributes in the 

United States, including within this judicial district, products such as, but not limited to, augmented 

reality headsets and services, including the Microsoft HoloLens series headsets and associated 

services (collectively, the “Accused Products”).

https://www.microsoft.com/en-us/hololens?icid=SSM_AS_Promo_Devices_HoloLens2

24. The Accused Products include HOLOEYE PLUTO liquid crystal on silicon

(LCOS) reflective phase-only spatial light modulator (SLM).

https://www.mdpi.com/2076-3417/8/11/2323/pdf

https://www.microsoft.com/en-us/research/wp-content/uploads/2017/05/holo_author.pdf

25. Spatial Light Modulators (SLM) are devices used to modulate the amplitude, phase, 

or polarization of light waves in space and time. Holoeye Photonics’ SLM systems are based on 

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 6 of 11
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LCD or LCOS liquid crystal micro displays.

https://holoeye.com/spatial-light-modulators/

26. The Accused Products include a polarization beam splitter (PBS) optically coupled 

to the SLM and a mirror optically coupled to the PBS, where the PBS is adapted to direct an input 

beam to the mirror.

https://www.microsoft.com/en-us/research/wp-content/uploads/2017/05/holo_author.pdf

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 7 of 11
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https://www.microsoft.com/en-us/research/wp-content/uploads/2017/05/holo_author.pdf

27. On information and belief, the Accused Products contain first and second quarterwave plates used in the polarization of the light beam passing through the PBS so that the SLM 

can spatially modulate the beam received from the PBS and direct a resulting spatially modulated 

beam back to the PBS and so that a second quarter-wave plate may impart on the spatially 

modulated beam a second polarization that causes the PBS to direct the spatially modulated beam 

to an output port to form an output beam. 

https://www.microsoft.com/en-us/research/wp-content/uploads/2017/05/holo_author.pdf

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 8 of 11
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https://holoeye.com/spatial-light-modulators/

28. In view of preceding paragraphs, each and every element of at least claim 1 of the 

’286 Patent is found in the Accused Products.

29. Microsoft has and continues to directly infringe at least one claim of the ’286

Patent, literally or under the doctrine of equivalents, by making, using, selling, offering for sale, 

importing, and/or distributing the Accused Products in the United States, including within this 

judicial district, without the authority of Brazos.

30. Microsoft has received notice and actual or constructive knowledge of the ’286

Patent since at least the date of service of this Complaint.

31. Since at least the date of service of this Complaint, through its actions, Microsoft 

has actively induced product makers, distributors, retailers, and/or end users of the Accused 

Products to infringe the ’286 Patent throughout the United States, including within this judicial 

district, by, among other things, advertising and promoting the use of the Accused Products in 

various websites, including providing and disseminating product descriptions, operating manuals, 

and other instructions on how to implement and configure the Accused Products. Examples of 

such advertising, promoting, and/or instructing include the documents at:

• https://www.microsoft.com/enus/hololens?icid=SSM_AS_Promo_Devices_HoloLens2 

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• https://www.microsoft.com/en-us/research/wpcontent/uploads/2017/05/holo_author.pdf 

32. Since at least the date of service of this Complaint, through its actions, Microsoft

has contributed to the infringement of the ’286 Patent by having others sell, offer for sale, or use 

the Accused Products throughout the United States, including within this judicial district, with

knowledge that the Accused Products infringe the ’286 Patent. The Accused Products are 

especially made or adapted for infringing the ’286 Patent and have no substantial non-infringing 

use. For example, in view of the preceding paragraphs, the Accused Products contain functionality 

which is material to at least one claim of the ’286 Patent.

JURY DEMAND

Brazos hereby demands a jury on all issues so triable.

REQUEST FOR RELIEF

WHEREFORE, Brazos respectfully requests that the Court:

(A) Enter judgment that Microsoft infringes one or more claims of the ’286 Patent 

literally and/or under the doctrine of equivalents;

(B) Enter judgment that Microsoft has induced infringement and continues to induce 

infringement of one or more claims of the ’286 Patent;

(C) Enter judgment that Microsoft has contributed to and continues to contribute to 

the infringement of one or more claims of the ’286 Patent;

(D) Award Brazos damages, to be paid by Microsoft in an amount adequate to 

compensate Brazos for such damages, together with pre-judgment and post-judgment interest for 

the infringement by Microsoft of the ’286 Patent through the date such judgment is entered in 

Case 6:20-cv-00337-ADA Document 1 Filed 04/28/20 Page 10 of 11
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accordance with 35 U.S.C. § 284, and increase such award by up to three times the amount found 

or assessed in accordance with 35 U.S.C. § 284;

(E) Declare this case exceptional pursuant to 35 U.S.C. § 285; and

(F) Award Brazos its costs, disbursements, attorneys’ fees, and such further and 

additional relief as is deemed appropriate by this Court.

Dated: April 28, 2020 Respectfully submitted,

/s/ James L. Etheridge

James L. Etheridge

Texas State Bar No. 24059147 

Ryan S. Loveless

Texas State Bar No. 24036997 

Travis L. Richins

Texas State Bar No. 24061296

ETHERIDGE LAW GROUP, PLLC

2600 E. Southlake Blvd., Suite 120 / 324

Southlake, Texas 76092

Telephone: (817) 470-7249

Facsimile: (817) 887-5950

Jim@EtheridgeLaw.com

Ryan@EtheridgeLaw.com

Travis@EtheridgeLaw.com

COUNSEL FOR PLAINTIFF

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