For the Inventor, By the Inventor

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San Jose, CA, United States of America

E-Phocus, Inc.

USPTO Granted Patents = 13

% Expired Patents = 92.3

Forward Citations = 679

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11 inventors (with patents filed for the assignee):

Tzu-Chiang Hsieh (10 out of 11 patents)

Calvin Chao (8 out of 8 patents)

Michael Engelmann (4 out of 7 patents)

4. Milam Pender (4 out of 4 patents)

5. Peter J Martin (3 out of 23 patents)

6. Chris Sexton (1 out of 4 patents)

7. Michael G Engelman (1 out of 1 patent)

8. Teu Chiang Hsieh (1 out of 1 patent)

9. Milan Pender (1 out of 1 patent)

10. Tzu-Chiang Hsish (1 out of 1 patent)

11. Paul A Johnson (1 out of 24 patents)

13 patents: Sort by Forward Citations

1. 7906826 - Many million pixel image sensor (2011-03-15),

2. 7820525 - Method for manufacturing hybrid image sensors (2010-10-26),

3. 7786543 - CDS capable sensor with photon sensing layer on active pixel circuit (2010-08-31),

4. 7525168 - CMOS sensor with electrodes across photodetectors at approximately equal potential (2009-04-28),

5. 7436038 - Visible/near infrared image sensor array (2008-10-14),

6. 7411233 - Photoconductor-on-active-pixel (POAP) sensor utilizing a multi-layered radiation absorbing structure (2008-08-12),

7. 7276749 - Image sensor with microcrystalline germanium photodiode layer (2007-10-02),

8. 7196391 - MOS or CMOS sensor with micro-lens array (2007-03-27),

9. 6809358 - Photoconductor on active pixel image sensor (2004-10-26),

10. 6798033 - Photoconductor-on-active-pixel (POAP) sensor utilizing a multi-layered radiation absorbing structure (2004-09-28),

11. 6791130 - Photoconductor-on-active-pixel (POAP) sensor utilizing a multi-layered radiation absorbing structure (2004-09-14),

12. 6730914 - Photoconductor-on-active-pixel (POAP) sensor utilizing equal-potential pixel electrodes (2004-05-04),

13. 6730900 - Camera with MOS or CMOS sensor array (2004-05-04),

Company Overview

E-Phocus, Inc. is a technology company based in San Jose, California, specializing in advanced imaging solutions and optical technologies. The organization focuses on developing innovative products that enhance visual experiences across various applications, including consumer electronics and industrial sectors. With a commitment to research and development, E-Phocus aims to push the boundaries of imaging capabilities, providing cutting-edge solutions that meet the evolving needs of its clients and partners.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

13 Patents

#452 in San Jose, CA

#5,661 in California

#23,854 in US

#45,081 in the World

San Jose, CA, United States of America

E-Phocus, Inc.

Forward Citations = 679

11 inventors:

Tzu-Chiang Hsieh (10 out of 11 patents)

Calvin Chao (8 out of 8 patents)

Michael Engelmann (4 out of 7 patents)

4. Milam Pender (4 out of 4 patents)

5. Peter J Martin (3 out of 23 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: E-Phocus, Inc.. Retrieved from https://idiyas.com/company/e-phocus

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]

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