Granted Patent
Utility
US 4,254,388 · App. 06/074,626
Frequency selector apparatus
Inventors:
Nobuo Mikoshiba, Shoichi Minagawa, Takeshi Okamoto
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Sep 12, 1979
Inventors
Nobuo Mikoshiba
Shoichi Minagawa
Takeshi Okamoto
Assignee (at issue)
CLARION 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.