Granted Patent
Utility
US 4,890,290 · App. 07/294,232
Laser light source with reduced sensitivity to optical feedback effects
Inventor:
Ralph T. Hawkins, II
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Jan 9, 1989
Inventor
Ralph T. Hawkins, II
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.