Robert E. Ellefson — 8 Patents at Inficon Ag

Robert E. Ellefson has been granted 8 US patents while listed as an inventor at Inficon Ag. The first was granted in 1992 and the most recent in May 2006. Robert E. Ellefson ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Robert E. Ellefson in Centerville, OH, US.

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Showing 1–8 of 8 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7041984	Replaceable anode liner for ion source	Louis C. Frees	2006-05-09
6642641	Apparatus for measuring total pressure and partial pressure with common electron beam	Louis C. Frees	2003-11-04	$176,000
RE38138	Method for linearization of ion currents in a quadrupole mass analyzer	David H. Holkeboer	2003-06-10
6476612	Louvered beam stop for lowering x-ray limit of a total pressure gauge	Louis C. Frees	2002-11-05	$50,000
6091068	Ion collector assembly	William Parfitt, Timothy L. Karandy, Louis C. Frees	2000-07-18
5889281	Method for linearization of ion currents in a quadrupole mass analyzer	David H. Holkeboer	1999-03-30
5122305	Solid-state radiation-emitting compositions and devices	Carol S. Ashley, C. Jeffrey Brinker, Scott T. Reed, Timothy J. Shepodd, Leroy E. Leonard +3 more	1992-06-16
5078919	Composition containing aerogel substrate loaded with tritium	Carol S. Ashley, C. Jeffrey Brinker, John T. Gill, Scott T. Reed, Robert J. Walko	1992-01-07

Robert E. Ellefson — 8 Patents

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