Granted Patent
Utility
US 4,404,867 · App. 06/369,885
Gear unit
Inventors:
Gerhard Mueller, Ernst Puritscher
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Apr 19, 1982
Inventors
Gerhard Mueller
Ernst Puritscher
Assignee (at issue)
Siemens Aktiengesellschaft
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.