IP Library › Granted Patent US 4,906,604
Granted Patent Utility
US 4,906,604 · App. 07/248,703

Multi-color heat sensitive recording material

Inventors: Tosaku Okamoto, Tomoyuki Okimoto, Katsuhiko Ishida
Patented Case View Patent ↗
Granted: Mar 6, 1990 Filed: Sep 23, 1988
Inventors
Tosaku Okamoto
Tomoyuki Okimoto
Katsuhiko Ishida
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,906,604
App. No.
07/248,703
Filed
1988-09-23
Granted
1990-03-06
Kind
A