1
Louis H Rorden, Ashok Patel, James V Leggett III, Frank L Gibbons, Steven C Owens: Method and apparatus for communicating data in a wellbore and for detecting the influx of gas. Baker Hughes Incorporated, Melvin A Hunn, January 7, 1997: US05592438 (66 worldwide citation)

A transducer is described especially for use in providing acoustic transmission in a borehole. The transducer includes a multiple number of magnetic circuit gaps and electrical windings that have been found to provide the power necessary for acoustic operation in a borehole while still meeting the s ...


2
Terry Byers, Frank L Gibbons, Eric L Christiansen: Impact detection system. The United States of America represented by the Administrator of the National Aeronautics and Space Administration, Theodore U Ro, September 28, 2010: US07805276 (3 worldwide citation)

In an embodiment, an apparatus and method capable of determining the time and location of a projectile's impact is disclosed. In another embodiment, an apparatus and method capable of determining the time and location of a projectile's impact as well as the direction from whence the projectile came ...