Granted Patent
Utility
US 5,197,768 · App. 07/774,351
Restrained joint having elastomer-backed locking segments
Inventor:
Randall C. Conner
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Oct 10, 1991
Inventor
Randall C. Conner
Assignee (at issue)
AMERICAN Cast Iron Pipe 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.