Granted Patent
Utility
US 6,774,615 · App. 10/056,865
Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences
Inventors:
Susumu Yoshida, Shuichi Hashimoto, Ryuki Kubohara, Tatsuhiko Kosugi, Takeyori Hara, Yoshiyuki Kagami
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Jan 25, 2002
Inventors
Susumu Yoshida
Shuichi Hashimoto
Ryuki Kubohara
Tatsuhiko Kosugi
Takeyori Hara
Yoshiyuki Kagami
Assignee (at issue)
Fujitsu Limited
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.