For the Inventor, By the Inventor

Enter assignee name

Solingen, Germany

C Rob. Hammerstein Gmbh

USPTO Granted Patents = 10

Forward Citations = 212

Loading Chart...

Loading Chart...

15 inventors (with patents filed for the assignee):

Burckhard Becker (10 out of 104 patents)

Heinz Bauer (10 out of 31 patents)

Ernst-Reiner Frohnhaus (6 out of 39 patents)

4. Alfred Gedig (6 out of 8 patents)

5. Josef Klink (3 out of 16 patents)

6. Antonin Koucky (2 out of 6 patents)

7. Ulrich Karthaus (1 out of 8 patents)

8. Ulrich Bruhnke (1 out of 1 patent)

9. Joachim Fausel (1 out of 1 patent)

10. Frank Krischen (1 out of 1 patent)

11. Horst Kohl (1 out of 1 patent)

12. Hans-Jurgen Schlaffke (1 out of 1 patent)

13. Reiner Frohnhaus (1 out of 1 patent)

14. Manfred Behrendt (1 out of 1 patent)

15. Jurgen Busch (1 out of 1 patent)

10 patents: Sort by Forward Citations

1. 5660437 - Child seat capable of being integrated into a motor-vehicle seat (1997-08-26),

2. 5596910 - Stepless locking device for an adjustable seat of a vehicle (1997-01-28),

3. 5443303 - Headrest for a vehicle seat (1995-08-22),

4. 5421640 - Back-rest hinge for a vehicle seat with a seat support and a back-rest (1995-06-06),

5. 4805481 - Self-locking revolute joint, adjustable to an angle by moving an (1989-02-21),

6. 4762366 - Self-locking revolute joint, adjustable step by step to an angle by (1988-08-09),

7. 4262963 - Guide rail assembly for a vehicle seat (1981-04-21),

8. 4209159 - Lockable guide assembly for adjustable vehicle seats (1980-06-24),

9. 4190225 - Device for adjusting vertical and inclined positions of a vehicle seat (1980-02-26),

10. 4189957 - Arrangement for arresting a seat of a vehicle (1980-02-26),

C Rob. Hammerstein Gmbh is a leading manufacturer of high-quality hammer tools for construction and industrial applications. With over 50 years of experience, our products are known for their durability, precision, and performance. We offer a wide range of hammer tools including chisels, hammers, mallets, and more, designed to meet the needs of professional tradespeople and DIY enthusiasts alike.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

10 Patents

#18 in Solingen

#3,753 in Germany

#55,883 in the World

Solingen, Germany

C Rob. Hammerstein Gmbh

Forward Citations = 212

15 inventors:

Burckhard Becker (10 out of 104 patents)

Heinz Bauer (10 out of 31 patents)

Ernst-Reiner Frohnhaus (6 out of 39 patents)

4. Alfred Gedig (6 out of 8 patents)

5. Josef Klink (3 out of 16 patents)

Please report any incorrect information to [email protected]

Loading…