Granted Patent
Utility
US 5,206,664 · App. 07/659,679
Recording apparatus using semiconductor laser
Inventors:
Akira Sasaki, Takeshi Kato
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Feb 25, 1991
Inventors
Akira Sasaki
Takeshi Kato
Assignee (at issue)
HITACHI, LTD.
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.