Granted Patent
Utility
US 4,640,120 · App. 06/747,646
Impact testing apparatus
Inventors:
Ronald F. Garritano, John Joseph O'Connor, Manuel E. Papayanopulos
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Jun 21, 1985
Inventors
Ronald F. Garritano
John Joseph O'Connor
Manuel E. Papayanopulos
Assignee (at issue)
Rheometrics, Inc.
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.