Granted Patent
Utility
US 4,463,644 · App. 06/500,451
Straight edge guide
Inventors:
Irwin J. Ferdinand, Richard Sylvan, Michael Peterson
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Jun 2, 1983
Inventors
Irwin J. Ferdinand
Richard Sylvan
Michael Peterson
Assignee (at issue)
The Hirsh Company
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.