% Expired Patents = 7.1

Trademarks = 3

Forward Citations = 96

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6 inventors (with patents filed for the assignee):

Payasada Kotrappa (6 out of 6 patents)

John C Dempsey (6 out of 10 patents)

Lorin R Stieff (6 out of 16 patents)

4. Robert W Ramsey, Jr (4 out of 5 patents)

5. Frederick Stieff (1 out of 1 patent)

6. Paul R Ramsey (1 out of 1 patent)

14 patents: Sort by Forward Citations

1. 8153959 - Measurement of undisturbed radon ground surface flux using a passive radon surface flux monitor (2012-04-10),

2. 7312439 - Radon progeny monitor (2007-12-25),

3. 5128540 - Gamma radiation compensated radon measurement system (1992-07-07),

4. 5126567 - Electret gamma/X-ray low level dosimeter (1992-06-30),

5. D327121 - Small volume ion chamber (1992-06-16),

6. 5107108 - Programmable controlled-exposure radon measurement system (1992-04-21),

7. 5055674 - Electret ionization chamber for monitoring radium and dissolved radon in (1991-10-08),

8. D318023 - Collapsible radon monitor (1991-07-09),

9. D318022 - Radon monitor (1991-07-09),

10. 5008540 - Electret gamma/X-ray low level dosimeter (1991-04-16),

11. 4992658 - Electret ion chamber for radon monitoring (1991-02-12),

12. 4926053 - Radon monitor (1990-05-15),

13. 4853536 - Ionization chamber for monitoring radioactive gas (1989-08-01),

14. 4814608 - Subsoil radioactive gas measuring system (1989-03-21),

Company Overview

Rad Elec Inc. is a technology company based in Frederick, MD, specializing in advanced radiation detection and measurement solutions. The organization focuses on developing innovative products for various applications, including medical imaging, nuclear safety, and environmental monitoring. With a commitment to enhancing safety and efficiency in radiation-related fields, Rad Elec leverages its expertise to provide reliable and precise instruments that meet the needs of professionals in healthcare, research, and regulatory environments.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

14 Patents

#6 in Frederick, MD

#309 in Maryland

#22,319 in US

#42,249 in the World

Frederick, MD, United States of America

Rad Elec Inc.

Forward Citations = 96

6 inventors:

Payasada Kotrappa (6 out of 6 patents)

John C Dempsey (6 out of 10 patents)

Lorin R Stieff (6 out of 16 patents)

4. Robert W Ramsey, Jr (4 out of 5 patents)

5. Frederick Stieff (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Rad Elec Inc.. Retrieved from https://idiyas.com/company/rad-elec

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]