Granted Patent
Utility
US 4,565,670 · App. 06/489,410
Heat treating apparatus using microwaves
Inventors:
Hitoshi Miyazaki, Katsuyuki Ohtsuka, Kazutoshi Miyata
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Apr 26, 1983
Inventors
Hitoshi Miyazaki
Katsuyuki Ohtsuka
Kazutoshi Miyata
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.