Granted Patent
Utility
US 4,996,182 · App. 07/312,916
Heat-sensitive recording material
Inventors:
Takeshi Matsui, Takehiko Watanabe, Katsunori Miyazaki, Hiroo Hayashi
Patented Case
View Patent ↗
Granted: Feb 26, 1991
Filed: Feb 21, 1989
Inventors
Takeshi Matsui
Takehiko Watanabe
Katsunori Miyazaki
Hiroo Hayashi
Assignee (at issue)
TOYO BOSEKI KABUSHIKI KAISHA
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.