Granted Patent
Utility
US 6,724,563 · App. 09/790,634
Two-stage actuator with sensitivity function preventing disturbances at all frequencies
Inventors:
Masahito Kobayashi, Masaki Odai
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Feb 23, 2001
Inventors
Masahito Kobayashi
Masaki Odai
Assignee (at issue)
HITACHI, 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.