Granted Patent
Utility
US 6,149,720 · App. 09/505,681
Water-in-oil type emulsion ink for stencil printing
Inventors:
Keisuke Asada, Yukitaka Watarai, Koji Ono, Yoshihiko Sato
Patented Case
View Patent ↗
Granted: Nov 21, 2000
Filed: Feb 17, 2000
Inventors
Keisuke Asada
Yukitaka Watarai
Koji Ono
Yoshihiko Sato
Assignee (at issue)
Tohoru Ricoh 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.