Granted Patent
Utility
US 4,367,644 · App. 06/194,101
Adjustable die and key assembly
Inventors:
Fred Kramer, Gregg Gill
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Oct 6, 1980
Inventors
Fred Kramer
Gregg Gill
Assignee (at issue)
PENNSYLVANIA CRUSHER CORPORATION
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.