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Square D Starkstrom Gmbh

USPTO Granted Patents = 11

Forward Citations = 172

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6 inventors (with patents filed for the assignee):

Helmut Lemmer (7 out of 14 patents)

Josef Risthaus (3 out of 3 patents)

Heinz Kleine (2 out of 4 patents)

4. Heinz Grunst (2 out of 5 patents)

5. Bernd Ludwig (1 out of 4 patents)

6. Dirk Stiehl (1 out of 1 patent)

11 patents: Sort by Forward Citations

1. 4931757 - Contactor and/or circuit breaker (1990-06-05),

2. 4719542 - Quick-mount device for contactors (1988-01-12),

3. 4713636 - Circuit-breaker (1987-12-15),

4. 4713498 - Switch gear (1987-12-15),

5. 4703141 - Actuation attachment for electrical controlling and signalling devices, (1987-10-27),

6. 4691978 - Circuit breaker, in particular an accessory or motor contactor (1987-09-08),

7. 4688011 - Motor safety switch (1987-08-18),

8. 4616117 - Double pole circuit breaker (1986-10-07),

9. 4594484 - Switch bridge arrangement for an electrical switch (1986-06-10),

10. 4578549 - Snap action electrical switch (1986-03-25),

11. 4577174 - Electromagnet for electric switching device (1986-03-18),

Square D Starkstrom GmbH is a leading provider of electrical distribution and industrial control products and solutions. With a strong focus on innovation and quality, the company offers a wide range of products including circuit breakers, switches, and automation systems. Serving customers across various industries, Square D Starkstrom GmbH is dedicated to providing reliable and efficient electrical solutions for every application.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

11 Patents

#70 in

#3,520 in Germany

#51,671 in the World