Robert M. Tessari — 15 Patents at Tescom

Robert M. Tessari has been granted 15 US patents while listed as an inventor at Tescom. The first was granted in 1995 and the most recent in November 2014. Robert M. Tessari ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list Robert M. Tessari in Calgary, AB, CA.

Issued Patents All Time

Showing 1–15 of 15 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
8881835	Manipulator tool and tool catcher useful with wellbore reverse circulation	Barry J. Tate, Tommy M. Warren	2014-11-11	$44,387,000
8443906	Tools and methods useful with wellbore reverse circulation	Barry J. Tate, Tommy M. Warren	2013-05-21	$38,097,000
7647990	Method for drilling with a wellbore liner	Tommy M. Warren, Barry J. Tate	2010-01-19	$6,671,000
7637330	Casing bottom hole assembly retrieval process	Per Angman, Tommy M. Warren	2009-12-29	$6,351,000
7624820	Method for drilling with casing	Per Angman	2009-12-01	$5,990,000
7475742	Method for drilling with casing	Per Angman	2009-01-13	$7,077,000
7472763	Wear resistant tubular connection	Maurice William Slack, Per Angman, Tommy M. Warren	2009-01-06	$7,285,000
7219727	Wear resistant tubular connection	Maurice William Slack, Per Angman, Tommy M. Warren	2007-05-22	$9,988,000
7140455	Valve method for drilling with casing using pressurized drilling fluid	Bruno Walter, Per Angman	2006-11-28	$2,775,000
7108080	Method and apparatus for drilling a borehole with a borehole liner	Bruce D. Houtchens	2006-09-19	$5,487,000
7013992	Borehole stabilization while drilling	Tommy M. Warren, Per Angman, Maurice William Slack	2006-03-21	$5,464,000
6705413	Drilling with casing	—	2004-03-16	$3,109,000
6585052	Casing centralizer	Per Angman	2003-07-01	$3,744,000
6513223	Method for installing a centralizer retaining collar and outer sleeve	Per Angman	2003-02-04	$5,359,000
5433279	Portable top drive assembly	Per Angman	1995-07-18

Robert M. Tessari — 15 Patents

Issued Patents All Time

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