Granted Patent
Utility
US 6,224,296 · App. 09/112,310
Sliding double panel type trench shoring system
Inventor:
Kenich Fukumori
Patented Case
View Patent ↗
Granted: May 1, 2001
Filed: Jul 9, 1998
Inventor
Kenich Fukumori
Assignee (at issue)
Japan Speed Shore 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.