Granted Patent
Utility
US 5,009,705 · App. 07/458,099
Microdrill bit
Inventors:
Hironori Yoshimura, Inada Shyogo
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Dec 28, 1989
Inventors
Hironori Yoshimura
Inada Shyogo
Assignee (at issue)
Mitsubishi Metal Corporation
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.