Granted Patent
Utility
US 4,495,141 · App. 06/047,774
Tagging gas releasing element
Inventor:
Satoru Ozaki
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Jun 12, 1979
Inventor
Satoru Ozaki
Assignee (at issue)
Doryokuro Kakunenryo Kaihatsu Jigyodan
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.