Granted Patent
Utility
US 4,802,409 · App. 06/934,036
Printing mechanism with torque limiting detent elements on actuating knob
Inventors:
Heinrich Volk, Ulf Koch
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: Nov 24, 1986
Inventors
Heinrich Volk
Ulf Koch
Assignee (at issue)
Esselte Meto International GmbH
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.