Granted Patent
Utility
US 6,234,021 · App. 09/243,324
Enhanced detection of vibration
Inventors:
Kenneth Ralph Piety, James C. Robinson, William S. Johnson, James B. Vanvoorhis
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Feb 2, 1999
Inventors
Kenneth Ralph Piety
James C. Robinson
William S. Johnson
James B. Vanvoorhis
Assignee (at issue)
CSI Technology 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.