Granted Patent
Utility
US 6,745,928 · App. 09/767,823
Trigger valve apparatus for pneumatic tool
Inventors:
Yoshinori Ishizawa, Masanori Aoki, Hiroki Kitagawa
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Jan 24, 2001
Inventors
Yoshinori Ishizawa
Masanori Aoki
Hiroki Kitagawa
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.