For the Inventor, By the Inventor

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Wuppertal, Germany

Schaeffer Gmbh

USPTO Granted Patents = 3

Forward Citations = 36

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8 inventors (with patents filed for the assignee):

Gunter Wolfertz (2 out of 3 patents)

Michael Schwarz (1 out of 19 patents)

Roger Wolfertz (1 out of 1 patent)

4. Wolfgang Collas (1 out of 1 patent)

5. Theo Breuer (1 out of 1 patent)

6. Karl J Kochs (1 out of 1 patent)

7. Ulrich Viering (1 out of 1 patent)

8. Heinz D Kopatz (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 5263627 - Machine for attaching buttons, rivets or the like, preferably to (1993-11-23),

2. 5181300 - Waistband fastener (1993-01-26),

3. 4928362 - Button, particularly for articles of clothing (1990-05-29),

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USPTO Data Jan 1 1976 - Jan 6 2026

3 Patents

#100 in Wuppertal

#8,288 in Germany

Wuppertal, Germany

Schaeffer Gmbh

Forward Citations = 36

8 inventors:

Gunter Wolfertz (2 out of 3 patents)

Michael Schwarz (1 out of 19 patents)

Roger Wolfertz (1 out of 1 patent)

4. Wolfgang Collas (1 out of 1 patent)

5. Theo Breuer (1 out of 1 patent)

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