Granted Patent
Utility
US 4,356,632 · App. 06/154,163
Writing apparatus
Inventor:
Gerold Anderka
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: May 28, 1980
Inventor
Gerold Anderka
Assignee (at issue)
Koh-I-Noor Rapidograph, 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.