Granted Patent
Utility
US 5,274,652 · App. 08/047,032
Harmonic wave generator, a method of producing a harmonic wave and a reading apparatus for an optical recording medium using the harmonic wave generator or the method of producing a harmonic wave
Inventors:
Tadanori Senoh, Yuzuru Tanabe, Motoichi Ohtsu
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Apr 12, 1993
Inventors
Tadanori Senoh
Yuzuru Tanabe
Motoichi Ohtsu
Assignee (at issue)
ASAHI GLASS CO., 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.