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For the Inventor, By the Inventor

Berlin, Germany

Franz Spirk

This inventor holds 13 USPTO granted patents. Top assignee: Siemens Aktiengesellschaft. Active years: 1976-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Franz Spirk. Retrieved from https://idiyas.com/inventor/franz-spirk

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

USPTO Granted Patents = 13

% Patents Active = 100.0

Average Co-Inventor Count = 1.3

ph-index = 5

Forward Citations = 95(Granted Patents)


Company Filing History:

goldMedal13 out of 30,886 
 
Siemens Aktiengesellschaft
 patents

Years Active: 1976-1993

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13 patents (USPTO):Explore Patents
1. 5196751 - Large-diameter a.c. motor with joints in the stator (1993-03-23),
2. 4672252 - Electrical machine with a stator lamination of grain-oriented sheets (1987-06-09),
3. 4621211 - Electrical machine brushes and sliprings with brush dust collecting (1986-11-04),
4. 4367890 - Turbine set with a generator feeding a network of constant frequency (1983-01-11),
5. 4338537 - Synchronous turbine type electric motor (1982-07-06),
6. 4322645 - Liquid-cooled electric machine (1982-03-30),
7. 4283648 - Synchronous electric machine with salient poles in the rotor (1981-08-11),
8. 4277709 - Large diameter synchronous electric machine (1981-07-07),
9. 4211946 - Asynchronous electric machine (1980-07-08),
10. 4149100 - Excitation winding arrangement for a synchronous electric machine having (1979-04-10),
11. 4070593 - Excitation winding arrangement for a synchronous electric machine (1978-01-24),
12. 3935490 - Supporting arrangement for the rotor of a vertical electric machine such (1976-01-27),
13. 3935488 - Method of operating a fluid-cooled hydropower generator (1976-01-27),

Title: Franz Spirk: Innovator in Electrical Engineering

Introduction

Franz Spirk is a notable inventor based in Berlin, Germany. He has made significant contributions to the field of electrical engineering, particularly in the development of advanced electrical machines. With a total of 13 patents to his name, Spirk's work has had a lasting impact on the industry.

Latest Patents

Among his latest innovations is a large-diameter alternating current (a.c.) motor with joints in the stator. This invention features a laminated stator composed of grain-oriented sheets, which have a preferential magnetic direction extending longitudinally along the teeth of the sheet. This design allows for a reduction in excitation current, enabling an enlarged air gap in the machine. Consequently, the mechanical stability of the machine is enhanced, making it particularly useful in asynchronous tube generators.

Career Highlights

Franz Spirk is currently associated with Siemens Aktiengesellschaft, a leading global technology company. His work at Siemens has allowed him to push the boundaries of electrical machine design and efficiency. His innovative approaches have contributed to the advancement of electrical engineering technologies.

Collaborations

Throughout his career, Spirk has collaborated with esteemed colleagues such as Joachim Eckert and Rudolf Von Musil. These partnerships have fostered a creative environment that has led to groundbreaking inventions in the field.

Conclusion

Franz Spirk's contributions to electrical engineering exemplify the spirit of innovation. His patents and collaborations have significantly advanced the technology of electrical machines, ensuring a lasting legacy in the industry.

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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