Granted Patent
Utility
US 5,297,421 · App. 07/845,185
Leak detection system for gas, steam or the like that involves multi-point sampling
Inventors:
Akira Hosonuma, Teruyuki Onodera, Saburoh Takahashi, Kunio Sakashita, Yoshinori Hiroshige
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Mar 3, 1992
Inventors
Akira Hosonuma
Teruyuki Onodera
Saburoh Takahashi
Kunio Sakashita
Yoshinori Hiroshige
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.