Granted Patent
Utility
US 4,743,142 · App. 06/872,915
Precoated corrosion-resistant steel pipe piles for marine use, and structure thereof
Inventors:
Motoo Shiraishi, Mansei Tanaka, Minoru Nakamura, Koichi Sato
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: Jun 10, 1986
Inventors
Motoo Shiraishi
Mansei Tanaka
Minoru Nakamura
Koichi Sato
Assignee (at issue)
NIPPON STEEL CORPORATION
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.