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For the Inventor, By the Inventor

Hamden, CT, United States of America

David A Krohn

This inventor holds 27 USPTO granted patents, primarily in Optoelectronics Technology. Top assignees: American Optical Corporation, Eotec, 3M Innovative Properties Company. Active years: 1976-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: David A Krohn. Retrieved from https://idiyas.com/inventor/david-a-krohn

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

USPTO Granted Patents = 27

% Patents Active = 100.0

Average Co-Inventor Count = 1.9

ph-index = 9

Forward Citations = 458(Granted Patents)


Location History:

  • Southbridge, MA (US) (1976 - 1978)
  • Milford, CT (US) (1981)
  • Hamden, CT (US) (1979 - 1995)

Company Filing History:

goldMedal14 out of 409 
 
American Optical Corporation
 patents
silverMedal8 out of 11 
 
Eotec
 patents
bronzeMedal2 out of 22,398 
 
3M Innovative Properties Company
 patents
4. 2 out of 4,227 
 
Exxon Research and Engineering Company
 patents
5. 1 out of 1 
 
3M Fiber Optic Products, Inc.
 patent

Years Active: 1976-1995

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Areas of Expertise:
Optical Fibers
Photochromic Lenses
Optoelectronic Sensors
Ophthalmic Lenses
Fiber Optic Measurement
Infrared Transmission
Liquid Level Sensors
Utility Meter Reading
Graded Index Fibers
Ion Exchange Glass
Faraday Rotation
High Strength Lenses
27 patents (USPTO):Explore Patents
1. 5381504 - Optical fiber element having a permanent protective coating with a Shore (1995-01-10),
2. 5221308 - Low loss infrared transmitting hollow core optical fiber method of (1993-06-22),
3. 5073027 - Fiber optic displacement measuring apparatus (1991-12-17),
4. 4703309 - Precision optoelectronic rotational position sensor (1987-10-27),
5. 4698616 - Optoelectronic rotational position sensor (1987-10-06),
6. 4679029 - Optoelectronic rotational position sensor (1987-07-07),
7. 4606226 - Liquid level sensor (1986-08-19),
8. 4500870 - Method and components for remote reading of utility meters (1985-02-19),
9. 4289516 - Low loss optical fibers (1981-09-15),
10. 4277271 - Method of manufacturing graded index optical fibers (1981-07-07),
11. 4277270 - Method of manufacture of optical fiber (1981-07-07),
12. 4273585 - Sealing glass (1981-06-16),
13. 4163654 - Method of manufacturing graded index optical fibers (1979-08-07),
14. 4155734 - Preparation of photochromic gradient lenses (1979-05-22),
15. 4101302 - Photochromic gradient lenses (1978-07-18),

Title: The Innovative Journey of David A Krohn

Introduction: David A Krohn is a renowned inventor based in Hamden, Connecticut, known for his groundbreaking contributions to various fields through his inventive spirit and dedication to innovation.

Latest Patents: David A Krohn holds several patents in diverse areas such as technology, healthcare, and consumer products, showcasing his versatility and creativity in inventing novel solutions to complex problems.

Career Highlights: With a career spanning over two decades, David A Krohn has established himself as a prolific inventor with a keen eye for identifying gaps in the market and developing unique inventions to address them. His innovative mindset has led to the successful commercialization of several products that have made a positive impact on society.

Collaborations: Throughout his career, David A Krohn has collaborated with leading companies, research institutions, and universities to bring his inventions to life. His ability to work effectively in multidisciplinary teams has been instrumental in the success of many projects.

Conclusion: In conclusion, David A Krohn's passion for innovation and his relentless pursuit of excellence have solidified his reputation as a visionary inventor. His contributions have not only transformed industries but have also inspired the next generation of inventors to push the boundaries of what is possible.

Profile summary based on public USPTO records.
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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