Granted Patent
Utility
US 6,604,432 · App. 09/530,662
Soil compaction measurement
Inventors:
William Hamblen, Frank Berkman, Bill G. Watters
Patented Case
View Patent ↗
Granted: Aug 12, 2003
Filed: May 2, 2000
Inventors
William Hamblen
Frank Berkman
Bill G. Watters
Assignee (at issue)
BBN 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.