Granted Patent
Utility
US 5,313,982 · App. 08/121,174
Gas supply piping device for a process apparatus
Inventors:
Tadahiro Ohmi, Nakahara Fumio, Tuyosi Satoh, Masaru Umeda
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Sep 13, 1993
Inventors
Tadahiro Ohmi
Nakahara Fumio
Tuyosi Satoh
Masaru Umeda
Assignee (at issue)
Tadahiro Ohmi
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.