John D. Stephens — 9 Patents at Biofield

John D. Stephens has been granted 9 US patents while listed as an inventor at Biofield. The first was granted in 1991 and the most recent in August 2018. John D. Stephens ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list John D. Stephens in Conroe, TX, US.

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Showing 1–9 of 9 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
10058089	Electromechanical horn for deterring animals	Leah Stephens, Matthew T. Fisher	2018-08-28
9504233	Electromechanical horn for deterring animals	Leah Stephens	2016-11-29
6351666	Method and apparatus for sensing and processing biopotentials	Jack A. Cuzick, Richard J. Davies, Vera Borgwardt, Craig M. Housworth, Xingye Lei +2 more	2002-02-26
5895298	DC biopotential electrode connector and connector condition sensor	Mark L. Faupel, Seth D. Nathanson	1999-04-20
5823957	D.C. biopotential sensing electrode and electroconductive medium for use therein	Mark L. Faupel, Burke Barrett, Seth D. Nathanson	1998-10-20	$466,000
5678547	Method and apparatus for screening or sensing bodily conditions using DC biopotentials	Mark L. Faupel, Charles Leonard Gordon, Seth D. Nathanson, Kenneth Edward Doe, Steven Erik Hagstrom	1997-10-21	$905,000
5660177	D.C. biopotential sensing electrode assemblies for apparatus for disease, injury and bodily condition screening or sensing	Mark L. Faupel, Burke Barrett, Seth D. Nathanson	1997-08-26	$892,000
D374184	DC biopotential measuring unit	Seth D. Nathanson, LeRoy J. LaCelle, Ted Pierson, Laura Welland	1996-10-01
4986274	Fetal anatomic sex assignment by ultrasonography during early pregnancy	—	1991-01-22

John D. Stephens — 9 Patents

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