Granted Patent
Utility
US 4,552,385 · App. 06/455,037
Boltless restrained pipe joint
Inventor:
Robert G. Peting
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Jan 3, 1983
Inventor
Robert G. Peting
Assignee (at issue)
AMSTED INDUSTRIES INCORPORATED
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.