Granted Patent
Utility
US 4,887,830 · App. 07/174,825
Wheelchair with combined wheel lock and hill holder
Inventors:
Gerald Fought, Raymond J. Herrmann
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Mar 29, 1988
Inventors
Gerald Fought
Raymond J. Herrmann
Assignee (at issue)
INVACARE CORPORATION
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.