Michael B. Vinzant — 10 Patents at Otis Engineering

Michael B. Vinzant has been granted 10 US patents while listed as an inventor at Otis Engineering. The first was granted in 1984 and the most recent in November 2011. Michael B. Vinzant ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Michael B. Vinzant in Carrollton, TX, US.

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
8047294	Dual flapper safety valve	James Dan Vick, Jr., James M. Williams	2011-11-01	$22,159,000
7798229	Dual flapper safety valve	James Dan Vick, Jr., James M. Williams	2010-09-21	$75,632,000
6302210	Safety valve utilizing an isolation valve and method of using the same	Robert W. Crow, Michael Wade Meaders, Gerald L. LeBoeuf	2001-10-16	$19,493,000
4834183	Surface controlled subsurface safety valve	Craig D. Hines, Rennie L. Dickson, Robert C. Hammett	1989-05-30	$4,523,000
4723606	Surface controlled subsurface safety valve	Phillip S. Sizer, Ronald K. Churchman, Rennie L. Dickson, Roddie R. Smith	1988-02-09	$28,375,000
RE32343	Well safety valve	Steven C. Speegle, Michael Wade Meaders, Robert L. Hilts	1987-02-03
4469179	Safety system	Robert W. Crow, Kenneth L. Schwendemann	1984-09-04	$7,465,000
4461353	Well safety valve	Steven C. Speegle, Michael Wade Meaders, Robert L. Hilts	1984-07-24	$10,177,000
4452311	Equalizing means for well tools	Steven C. Speegle, Vinson D. Sullivan	1984-06-05	$5,531,000
4448216	Subsurface safety valve	Steven C. Speegle, Kenneth L. Schwendemann, Robert W. Crow, Cary Gorten Mondon	1984-05-15	$10,037,000

Michael B. Vinzant — 10 Patents

Issued Patents All Time

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