The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 2010
Filed:
Jun. 29, 2005
James Milne, Aberdeen, GB;
Jennifer Rust, Aberdeen, GB;
Chris Sykes, Aberdeen, GB;
Mark Bennett, Guildford, GB;
James Milne, Aberdeen, GB;
Jennifer Rust, Aberdeen, GB;
Chris Sykes, Aberdeen, GB;
Mark Bennett, Guildford, GB;
OHM Limited, Bridge of Don, Aberdeen, GB;
Abstract
A submersible electromagnetic (EM) field generator for seafloor electromagnetic surveying comprising an AC to DC converter operable to generate a DC output from an AC input and a switching module operable to generate a waveform driving signal by selectively switching the DC output. The EM field generator also comprises an antenna that is operable to generate an EM field in response to the waveform driving signal. This design approach of using a switched DC source allows square or rectangular wave EM signals to be generated which have sharp transition characteristics and which are substantially independent of the AC input characteristics.