Granted Patent
Utility
US 4,978,580 · App. 07/324,982
Thermal transfer recording medium
Inventors:
Toshiaki Tezuka, Takao Abe
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Mar 14, 1989
Inventors
Toshiaki Tezuka
Takao Abe
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.