Granted Patent
Utility
US 4,464,101 · App. 06/355,926
Seizure-free, highly fluid tight and lightweight vane compressor
Inventor:
Tsunenori Shibuya
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Mar 8, 1982
Inventor
Tsunenori Shibuya
Assignee (at issue)
T. Shibuya (Diesel Kiki Co., 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.