Granted Patent
Utility
US 5,625,643 · App. 08/108,547
Modulator and demodulator apparatus
Inventors:
Takashi Kaku, Noboru Kawada
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Aug 19, 1993
Inventors
Takashi Kaku
Noboru Kawada
Assignee (at issue)
Fujitsu Limited
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.