Granted Patent
Utility
US 6,196,019 · App. 09/347,643
Accumulator
Inventors:
Yutaka Higo, Keiji Yamazaki, Takayuki Fujii
Patented Case
View Patent ↗
Granted: Mar 6, 2001
Filed: Jul 6, 1999
Inventors
Yutaka Higo
Keiji Yamazaki
Takayuki Fujii
Assignee (at issue)
Showa Aluminum Corp.
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.