Granted Patent
Utility
US 4,483,056 · App. 06/397,836
Tool for closing pipe couplings
Inventors:
Dieter Schwalm, Rainer Neumann
Patented Case
View Patent ↗
Granted: Nov 20, 1984
Filed: Jul 13, 1982
Inventors
Dieter Schwalm
Rainer Neumann
Assignees (at issue)
Kurt O. Moebius
Hackforth GmbH & Co. KG
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.