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For the Inventor, By the Inventor

Pasadena, MD, United States of America

Charles S Kerfoot

This inventor holds 22 USPTO granted patents, primarily in Electric Vehicle Technology. Top assignees: United States of America as Represented by the Secretary of the Air Force, Westinghouse Electric Corporation, Northrop Grumman Systems Corporation. Active years: 1976-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Charles S Kerfoot. Retrieved from https://idiyas.com/inventor/charles-s-kerfoot

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

USPTO Granted Patents = 22

% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 10

Forward Citations = 381(Granted Patents)


Company Filing History:

goldMedal11 out of 5,088 
 
United States of America as Represented by the Secretary of the Air Force
 patents
silverMedal5 out of 8,033 
 
Westinghouse Electric Corporation
 patents
bronzeMedal3 out of 3,450 
 
Northrop Grumman Systems Corporation
 patents
4. 3 out of 8,745 
 
US Government as Represented by the Secretary of the Army
 patents

Years Active: 1976-1998

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Areas of Expertise:
Electric Vehicle Propulsion
AC Induction Motor Control
Battery Charger
Heat Dissipating Transformer
High Power Semiconductor Switch
Voltage Divider
Resonant Inverter
Radio Frequency Amplifier
FET Pulse Control
Laser Diode Modulator
Power Conditioner
Pulse Modulator
22 patents (USPTO):Explore Patents
1. 5831409 - Electric vehicle propulsion system employing AC induction motor control (1998-11-03),
2. 5634262 - Method of manufacturing heat dissipating transformer coil (1997-06-03),
3. 5581171 - Electric vehicle battery charger (1996-12-03),
4. 5469124 - Heat dissipating transformer coil (1995-11-21),
5. 5283463 - High power self commutating semiconductor switch (1994-02-01),
6. 5162965 - Anti crow bar current interrupter for microwave tube transmitters (1992-11-10),
7. 5122730 - Voltage divider for a wide band domino effect high voltage regulator (1992-06-16),
8. 5111382 - High power, high frequency resonant inverter using MOS controlled (1992-05-05),
9. 5070538 - Wide band domino effect high voltage regulator (1991-12-03),
10. 5032799 - Multistage cascode radio frequency amplifier (1991-07-16),
11. 4939450 - Precision high voltage FET pulse sense and clamp apparatus statement of (1990-07-03),
12. 4897617 - Domino effect amplifier (1990-01-30),
13. 4893070 - Domino effect shunt voltage regulator (1990-01-09),
14. H000575 - Light-weight non-saturating spaced core inductor (1989-02-06),
15. 4743785 - FET pulse control apparatus with fast rise time and constant pulse level (1988-05-10),

Title: The Innovative Journey of Charles S. Kerfoot

Introduction: Charles S. Kerfoot, a talented inventor hailing from Pasadena, MD, has made significant contributions to the world of innovation with his creative mind and dedication to progress.

Latest Patents: Charles S. Kerfoot's latest patents showcase his commitment to pushing boundaries and exploring new frontiers in technology and science.

Career Highlights: Throughout his illustrious career, Charles S. Kerfoot has demonstrated a keen ability to transform ideas into tangible inventions that have the potential to revolutionize industries and improve lives.

Collaborations: Charles S. Kerfoot has collaborated with leading experts in various fields, leveraging their collective knowledge and expertise to bring groundbreaking concepts to life.

Conclusion: In conclusion, Charles S. Kerfoot's passion for innovation and his relentless pursuit of excellence continue to inspire generations of inventors and shape the future of technology.

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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