Granted Patent
Utility
US 4,623,580 · App. 06/665,789
Thermal transfer recording medium
Inventors:
Kunihiro Koshizuka, Takao Abe, Shigehiro Kitamura, Masaki Nakamura, Yuji Hotta, Fumio Ishii
Patented Case
View Patent ↗
Granted: Nov 18, 1986
Filed: Oct 29, 1984
Inventors
Kunihiro Koshizuka
Takao Abe
Shigehiro Kitamura
Masaki Nakamura
Yuji Hotta
Fumio Ishii
Assignee (at issue)
Konishiroku Photo Industry 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.