Granted Patent
Utility
US 4,227,930 · App. 05/960,360
Ball point pen, ink, and its eradicator system
Inventor:
An-Chung R. Lin
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Nov 13, 1978
Inventor
An-Chung R. Lin
Assignee (at issue)
Burroughs, 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.