Granted Patent
Utility
US 5,268,890 · App. 08/015,019
Self-cleaning optical disc system
Inventor:
Willis G. Colescott
Patented Case
View Patent ↗
Granted: Dec 7, 1993
Filed: Feb 9, 1993
Inventor
Willis G. Colescott
Assignee (at issue)
DELCO ELECTRONICS CORPORATION
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.