Granted Patent
Utility
US 4,530,208 · App. 06/473,284
Fluid circulating system
Inventor:
Shigeki Sato
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Mar 8, 1983
Inventor
Shigeki Sato
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.