Granted Patent
Utility
US 4,866,546 · App. 07/111,696
Recording and reproducing apparatus for disk-type recording media
Inventors:
Shozo Nakagawa, Shunichi Ohnishi, Akihiro Takagi
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Oct 21, 1987
Inventors
Shozo Nakagawa
Shunichi Ohnishi
Akihiro Takagi
Assignees (at issue)
Asaka Corporation
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.