Granted Patent
Utility
US 4,306,437 · App. 06/101,533
System for planishing metal pipe
Inventors:
Laszlo Javorik, Vernon R. Fencl
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Dec 10, 1979
Inventors
Laszlo Javorik
Vernon R. Fencl
Assignee (at issue)
Grotnes Metalforming Systems, 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.