Granted Patent
Utility
US 4,529,992 · App. 06/547,493
Multicolor record material
Inventors:
Katsuhiko Ishida, Tomoyuki Okimoto, Tosaku Okamoto
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Nov 1, 1983
Inventors
Katsuhiko Ishida
Tomoyuki Okimoto
Tosaku Okamoto
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.