Granted Patent
Utility
US 6,674,590 · App. 09/845,986
System and method for estimating a frequency of slider airbearing resonance
Inventors:
Hal Hjalmar Ottesen, Gordon James Smith
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Apr 30, 2001
Inventors
Hal Hjalmar Ottesen
Gordon James Smith
Assignee (at issue)
Hitachi Global Technologies
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.