Granted Patent
Utility
US 5,182,138 · App. 07/618,944
Luminescent sheet for stamp and a method for the production thereof
Inventors:
Shigeji Matsuzawa, Eiji Yuasa, Junichiro Tanaka, Teruo Nakamura
Patented Case
View Patent ↗
Granted: Jan 26, 1993
Filed: Nov 27, 1990
Inventors
Shigeji Matsuzawa
Eiji Yuasa
Junichiro Tanaka
Teruo Nakamura
Assignee (at issue)
Kanzaki Paper Manufacturing 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.