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For the Inventor, By the Inventor

Schwieberdingen, Germany

Istvan Ragaly

This inventor holds 19 USPTO granted patents, primarily in Electric Machines. Top assignee: Robert Bosch. Active years: 1978-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Istvan Ragaly. Retrieved from https://idiyas.com/inventor/istvan-ragaly

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

Calculating rank
USPTO Granted Patents = 19

% Patents Active = 100.0

Average Co-Inventor Count = 1.3

ph-index = 8

Forward Citations = 161(Granted Patents)


Company Filing History:

goldMedal19 out of 30,255 
 
Robert Bosch
 patents

Years Active: 1978-2002

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Areas of Expertise:
Three-Phase Generator
Synchronous Machine
Claw Pole Generator
Dynamo Electric Machine
Alternator
Cooling Air Guidance
Semiconductor Diode
Electrical Network
Ventilation Fan
Low-Noise Operation
Dual Voltage System
Multi-Voltage Network
19 patents (USPTO):Explore Patents
1. 6362550 - Electric machine, especially a three-phase generator, with an exciter (2002-03-26),
2. 6333581 - Alternator with exciting means arrangement (2001-12-25),
3. 6229244 - Synchronous machine, in particular generator for a motor vehicle (2001-05-08),
4. 6144138 - Claw pole generator (2000-11-07),
5. 6057627 - Claw pole generator with ventilation fan supporting the magnetic pole (2000-05-02),
6. 6013967 - Synchronous machine, in particular generator for motor vehicle (2000-01-11),
7. 5317224 - Electric machine with means for guiding cooling air supplied from (1994-05-31),
8. 4894574 - Stator support for electric machine (1990-01-16),
9. 4755698 - Dynamo electric machine with low-noise operating characteristics (1988-07-05),
10. 4589855 - Forced air-cooled vehicular-type alternator (1986-05-20),
11. 4540907 - Alternator-rectifier unit with economical connections to wires embedded (1985-09-10),
12. 4463275 - Three-phase alternator with a positive non-flexibly coupled fan wheel (1984-07-31),
13. 4437846 - Speed limiting rotary coupling (1984-03-20),
14. 4328512 - Two-element semiconductor diode rectifier assembly structure (1982-05-04),
15. 4303935 - Semiconductor apparatus with electrically insulated heat sink (1981-12-01),

Title: Istvan Ragaly: A Pioneer in Electric Machine Innovation

Introduction: Istvan Ragaly, a prominent inventor based in Schwieberdingen, Germany, has made significant contributions to the field of electrical machines. With an impressive portfolio of 19 patents, Ragaly is recognized for his innovative designs that enhance the efficiency and functionality of electric generators.

Latest Patents: Among his latest inventions, Ragaly developed an electric machine, specifically a three-phase generator, featuring an advanced exciter. This generator utilizes a claw pole machine as the exciter, which supplies the necessary exciter current in a more compact form. By implementing permanent magnets in the leakage flux area, Ragaly effectively minimizes unwanted leakage fields, ensuring improved operational efficiency. Another noteworthy invention is an alternator with an exciting means arrangement, where the combination of a stator secured in a housing and a claw pole rotor with an exciter winding generates reliable electrical output. This concept includes an electrical repeater that enhances the excitation of the exciter winding, balancing stationary and rotating components for optimal performance.

Career Highlights: Ragaly's career trajectory is marked by his association with Robert Bosch GmbH, where he has harnessed his engineering skills to develop cutting-edge electric machinery. His continuous work on optimizing generator performance has solidified his reputation in the engineering community.

Collaborations: Throughout his career, Istvan Ragaly has collaborated with notable colleagues like Alexander Shendi and Hans-Peter Groeter. These partnerships have been instrumental in fostering innovative advancements and addressing the challenges within electrical machine technology.

Conclusion: With a passion for engineering and a proven record of patent innovations, Istvan Ragaly stands out as a leading inventor in the electric machine sector. His contributions, particularly in three-phase generator technology, continue to influence the industry, paving the way for future developments in electrical engineering.

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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