Granted Patent
Utility
US 5,735,470 · App. 08/895,627
Irrigation hose having holes formed on external walls of all flow passages
Inventors:
Tatsuya Ohe, Toshihisa Hori
Patented Case
View Patent ↗
Granted: Apr 7, 1998
Filed: Jul 17, 1997
Inventors
Tatsuya Ohe
Toshihisa Hori
Assignee (at issue)
Mitsui Petrochemical Industries, 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.