For the Inventor, By the Inventor

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Schwetzingen, Germany

Frankl & Kirchner

USPTO Granted Patents = 3

Forward Citations = 18

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4 inventors (with patents filed for the assignee):

Gustav Rohr (2 out of 4 patents)

Gerd Nohl (1 out of 3 patents)

Alfred Heidt (1 out of 1 patent)

4. Karl-Heinz Vetter (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 4707643 - Rotary speed ratio control for a multiple rotary drive system for a (1987-11-17),

2. 4696246 - Device for detecting an overlapping edge of material on a sewing machine (1987-09-29),

3. 3990374 - Contactless synchronizer for sewing machines (1976-11-09),

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USPTO Data Jan 1 1976 - Oct 13 2026

3 Patents

#5 in Schwetzingen

#8,427 in DT

Schwetzingen, Germany

Frankl & Kirchner

Forward Citations = 18

4 inventors:

Gustav Rohr (2 out of 4 patents)

Gerd Nohl (1 out of 3 patents)

Alfred Heidt (1 out of 1 patent)

4. Karl-Heinz Vetter (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Frankl & Kirchner. Retrieved from https://idiyas.com/company/frankl-and-kirchner

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]

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