Granted Patent
Utility
US 6,539,712 · App. 09/748,452
Hydraulic drive unit
Inventors:
Sigetaka Konishi, Kenji Suzuki, Hideki Sekiguchi, Takao Muto
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Dec 26, 2000
Inventors
Sigetaka Konishi
Kenji Suzuki
Hideki Sekiguchi
Takao Muto
Assignee (at issue)
Kayaba Kogyo Kabushiki Kaisha
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.