Granted Patent
Utility
US 4,346,445 · App. 06/127,663
Portable alphanumeric and symbol drafting device
Inventors:
Jean P. Leuenberger, David J. Logan, Clifford A. Scorso, Jr.
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: Mar 6, 1980
Inventors
Jean P. Leuenberger
David J. Logan
Clifford A. Scorso, Jr.
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.