Granted Patent
Utility
US 5,320,218 · App. 08/042,644
Closed container to be used in a clean room
Inventors:
Teppei Yamashita, Masanao Murata, Tsuyoshi Tanaka, Teruya Morita, Hitoshi Kawano, Atsushi Okuno, Masanori Tsuda, Mitsuhiro Hayashi
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Apr 5, 1993
Inventors
Teppei Yamashita
Masanao Murata
Tsuyoshi Tanaka
Teruya Morita
Hitoshi Kawano
Atsushi Okuno
Masanori Tsuda
Mitsuhiro Hayashi
Assignee (at issue)
Shinko Electric Co., Ltd.
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.