Granted Patent
Utility
US 4,347,477 · App. 06/178,483
Mat testing apparatus
Inventors:
Clifford A. Landsness, Thomas M. Buehrle
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Aug 15, 1980
Inventors
Clifford A. Landsness
Thomas M. Buehrle
Assignee (at issue)
B. F. Goodrich Company
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.