Granted Patent
Utility
US 6,488,134 · App. 09/849,921
Step-by-step ratchet mechanism with a silent ratchet
Inventors:
Burckhard Becker, Robert Houston
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: May 4, 2001
Inventors
Burckhard Becker
Robert Houston
Assignee (at issue)
C. Rob. Hammerstein GmbH & Co. KG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.