Granted Patent
Utility
US 4,494,738 · App. 06/356,219
Shock-absorbing joint and assembly with rotating arms and elastomeric spring action
Inventors:
Frederick G. Britton, Thomas A. Clark
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Mar 8, 1982
Inventors
Frederick G. Britton
Thomas A. Clark
Assignee (at issue)
OIL STATES INDUSTRIES, 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.