For the Inventor, By the Inventor

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Aliso Viejo, CA, United States of America

D Squared Ventures

USPTO Granted Patents = 3

Forward Citations = 0

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2 inventors (with patents filed for the assignee):

Harry Duane Romo (3 out of 77 patents)

David Hagopian (3 out of 3 patents)

3 patents: Sort by Forward Citations

1. 12047729 - Ear-fitting headphone attachment apparatus (2024-07-23),

2. 11641540 - Ear-fitting headphone attachment apparatus (2023-05-02),

3. 11478093 - Travel pillow apparatus, storage apparatus for the travel pillow apparatus, and methods of manufacturing and using the same (2022-10-25),

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

3 Patents

#54 in Aliso Viejo, CA

#16,411 in California

#71,950 in US

Aliso Viejo, CA, United States of America

D Squared Ventures

Forward Citations = 0

2 inventors:

Harry Duane Romo (3 out of 77 patents)

David Hagopian (3 out of 3 patents)

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