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For the Inventor, By the Inventor

Holland, MI, United States of America

Richard J Gahan

This inventor holds 9 USPTO granted patents and 3 published patent applications. Top assignees: Donnelly Corporation, Other. Active years: 1991-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Richard J Gahan. Retrieved from https://idiyas.com/inventor/richard-j-gahan

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

Calculating rank
USPTO Granted Patents = 9 

% Patents Active = 88.9

Average Co-Inventor Count = 3.3

ph-index = 9

Forward Citations = 3,836(Granted Patents)


Company Filing History:

goldMedal8 out of 912 
 
Donnelly Corporation
 patents
silverMedal1 out of 834,601 
Other
 patents

Years Active: 1991-2002

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9 patents (USPTO):Explore Patents
1. 6427349 - Compensation system for electronic compass (2002-08-06),
2. 6173501 - Compensation system for electronic compass (2001-01-16),
3. 5802727 - Compensation system for electronic compass (1998-09-08),
4. 5644851 - Compensation system for electronic compass (1997-07-08),
5. 5632092 - Compensation system for electronic compass (1997-05-27),
6. 5406414 - Electrochromic rearview mirror for vehicles with constant light (1995-04-11),
7. 5253109 - Electro-optic device with constant light transmitting area (1993-10-12),
8. 5193029 - Single sensor adaptive drive circuit for rearview mirror system (1993-03-09),
9. 5066112 - Perimeter coated, electro-optic mirror (1991-11-19),

Title: Biography of Richard J Gahan

Introduction: Richard J Gahan is an accomplished inventor based in Holland, MI (US). He holds a total of 9 patents, showcasing his innovative contributions to technology, particularly in the field of electronic compasses.

Latest Patents: One of his latest patents is a compensation system for electronic compasses designed for use in vehicles. This electronic compass utilizes a magnetoresistive sensor to detect the earth's magnetic field, operating in alternate set/reset bias modes. The system includes a closed-loop mechanism for deviation compensation, which measures sensor output signals and employs an offset current strap to nullify the vehicle's deviation field. The compass features an initial calibration mode that adjusts signal peak values to a nominal earth field level while the vehicle is in motion. It also has a normal compensation mode that adjusts signal reference values for each axis during the vehicle's ignition cycle.

Career Highlights: Throughout his career, Richard has worked with notable companies, including Donnelly Corporation. His work has significantly impacted the development of electronic navigation systems.

Collaborations: Richard has collaborated with esteemed colleagues such as Kenneth Schofield and Kenneth L Schierbeek. Their combined expertise has contributed to the advancement of innovative technologies in their field.

Conclusion: Richard J Gahan's contributions to the field of electronic compasses and his collaborative efforts with other professionals highlight his role as a significant inventor

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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