Granted Patent
Utility
US 4,504,094 · App. 06/418,686
Drive mechanism for invalid carriages
Inventor:
Donald L. Burrows
Patented Case
View Patent ↗
Granted: Mar 12, 1985
Filed: Sep 16, 1982
Inventor
Donald L. Burrows
Assignee (at issue)
Everest & Jennings Canadian Limited
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.