For the Inventor, By the Inventor

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Tucson, AZ, United States of America

Photometrics, Ltd.

USPTO Granted Patents = 15

Trademarks = 1

Forward Citations = 249

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19 inventors (with patents filed for the assignee):

Stephen L Marcus (3 out of 3 patents)

Peide Jeng (3 out of 3 patents)

Keith N Prettyjohns (3 out of 4 patents)

4. Roger W Cover (2 out of 3 patents)

5. William V Schempp (2 out of 3 patents)

6. David C Dalton (2 out of 3 patents)

7. Gary R Sims (1 out of 3 patents)

8. Emre Toker (1 out of 4 patents)

9. Derek Paul Guenther (1 out of 2 patents)

10. Mark S McKune (1 out of 1 patent)

11. Tim B Hunter (1 out of 1 patent)

12. Hans Roehrig (1 out of 2 patents)

13. Wilhelm Pfanhauser (1 out of 1 patent)

14. Richard S Aikens (1 out of 2 patents)

15. Kevin J Garcia (1 out of 4 patents)

15 patents: Sort by Forward Citations

1. 6388710 - Solid state camera with separate vacuum and sieve chambers (2002-05-14),

2. 5818571 - Apparatus with off-axis light path for characterizing the luminous (1998-10-06),

3. 5774214 - Multi-mode imaging apparatus for radiation-emitting or absorbing samples (1998-06-30),

4. 5760974 - Lens system for maximizing light collection efficiency and transmission (1998-06-02),

5. 5729336 - Apparatus and method for characterizing the luminous intensity of a lamp (1998-03-17),

6. 5594520 - Low supply voltage shutter driver (1997-01-14),

7. 5515329 - Variable-size first in first out memory with data manipulation (1996-05-07),

8. 5493332 - Modular electronic imaging system which accepts replacement solid state (1996-02-20),

9. 5386230 - Charged-coupled device camera with voltage adjustment control (1995-01-31),

10. 5371470 - Transverse filter circuit (1994-12-06),

11. 5338948 - Charge-coupled device with open gate structure (1994-08-16),

12. 5252850 - Apparatus for contouring a semiconductor, light responsive array with a (1993-10-12),

13. 5142557 - CCD and phosphor screen digital radiology apparatus and method for high (1992-08-25),

14. 5134680 - Solid state imaging apparatus with fiber optic bundle (1992-07-28),

15. 5134275 - Solid state exposuremeter (1992-07-28),

Company Overview

Photometrics, Ltd. is a leading developer and manufacturer of advanced imaging solutions, specializing in scientific cameras and imaging systems for various applications. Based in Tucson, Arizona, the company focuses on providing high-performance products for fields such as life sciences, astronomy, and industrial imaging. Their innovative technologies enable researchers and professionals to capture and analyze images with exceptional clarity and precision, supporting advancements in scientific discovery and technological development.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

15 Patents

#43 in Tucson, AZ

#258 in Arizona

#21,068 in US

#39,959 in the World

Tucson, AZ, United States of America

Photometrics, Ltd.

Forward Citations = 249

19 inventors:

Stephen L Marcus (3 out of 3 patents)

Peide Jeng (3 out of 3 patents)

Keith N Prettyjohns (3 out of 4 patents)

4. Roger W Cover (2 out of 3 patents)

5. William V Schempp (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Photometrics, Ltd.. Retrieved from https://idiyas.com/company/photometrics

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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