Granted Patent
Utility
US 4,648,671 · App. 06/868,980
Self locking coupling device
Inventors:
Yefim Torban, Joseph M. Hary
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: May 29, 1986
Inventors
Yefim Torban
Joseph M. Hary
Assignee (at issue)
ALLIED CONSULTING, 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.