Granted Patent
Utility
US 4,294,550 · App. 06/129,074
Ideographic typewriter
Inventor:
An Wang
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Mar 10, 1980
Inventor
An Wang
Assignee (at issue)
Wang Laboratories, 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.