Granted Patent
Utility
US 4,328,398 · App. 06/148,232
Digital multi-frequency receiver
Inventors:
Masaharu Kawaguchi, Yoshikatu Shiraishi, Kazuhiro Maruyama, Hitoshi Imagawa, Yoshimasa Kaneko
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: May 9, 1980
Inventors
Masaharu Kawaguchi
Yoshikatu Shiraishi
Kazuhiro Maruyama
Hitoshi Imagawa
Yoshimasa Kaneko
Assignees (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
Nippon Telegraph and Telephone Public Corporation
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.