Granted Patent
Utility
US 4,444,847 · App. 06/160,675
Electrostatic record material
Inventors:
Hironari Fujioka, Hisanori Yagi
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Jun 18, 1980
Inventors
Hironari Fujioka
Hisanori Yagi
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.