Granted Patent
Utility
US 6,307,809 · App. 09/330,587
Geophone with optical fiber pressure sensor
Inventors:
John Luscombe, Malcolm Paul Varnham, Erhard Lothar Edgar Kluth
Patented Case
View Patent ↗
Granted: Oct 23, 2001
Filed: Jun 11, 1999
Inventors
John Luscombe
Malcolm Paul Varnham
Erhard Lothar Edgar Kluth
Assignee (at issue)
GeoSensor 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.