Forward Citations = 371

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10 inventors (with patents filed for the assignee):

Richard Dennis Rallison (3 out of 26 patents)

Christopher D Wiegel (2 out of 2 patents)

Donald E Drumm (1 out of 16 patents)

4. Marc De Groot (1 out of 2 patents)

5. Michael J Donahue (1 out of 1 patent)

6. Michael A Perry (1 out of 1 patent)

7. Mark D Pesce (1 out of 1 patent)

8. Scott MacInnes (1 out of 1 patent)

9. Scott Maclness (1 out of 1 patent)

10. Jae P Park (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 5673151 - Image correction in virtual reality and heads up displays (1997-09-30),

2. D383455 - Head mounted display with headtracker (1997-09-09),

3. 5642227 - Optical correction for virtual reality and heads up displays (1997-06-24),

4. 5619377 - Optically corrected helmet mounted display (1997-04-08),

5. D375495 - Head mounted display (1996-11-12),

6. 5526022 - Sourceless orientation sensor (1996-06-11),

Company Overview

Virtual I/O, Inc. is a leading provider of virtual reality solutions for businesses. With our cutting-edge technology, we deliver immersive experiences that drive engagement and innovation. Our products enable companies to unlock new possibilities in training, marketing, and more. Visit our website to learn more about how Virtual I/O can help take your business to the next level.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

6 Patents

#314 in Seattle, WA

#1,070 in Washington

#45,007 in US

Seattle, WA, United States of America

Virtual I/o, Inc.

Forward Citations = 371

10 inventors:

Richard Dennis Rallison (3 out of 26 patents)

Christopher D Wiegel (2 out of 2 patents)

Donald E Drumm (1 out of 16 patents)

4. Marc De Groot (1 out of 2 patents)

5. Michael J Donahue (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Virtual I/o, Inc.. Retrieved from https://idiyas.com/company/virtual-i-o

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]