Granted Patent
Utility
US 4,125,298 · App. 05/778,463
Assembly of hardened and deformable metal parts
Inventors:
Gunther Heurich, Heinrich Hofmann
Patented Case
View Patent ↗
Granted: Nov 14, 1978
Filed: Mar 17, 1977
Inventors
Gunther Heurich
Heinrich Hofmann
Assignee (at issue)
Kugelfischer Georg Schafer & Co.
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.