Granted Patent
Utility
US 4,658,191 · App. 06/844,236
Motor rotation control apparatus
Inventors:
Masaya Okita, Masahiro Sawada, Tadashi Ota
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Mar 25, 1986
Inventors
Masaya Okita
Masahiro Sawada
Tadashi Ota
Assignee (at issue)
Nippon Kogaku K.K.
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.