Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Gary Francis Stack — 7 Patents

Delphi Technologies: 5 patents #650 of 4,124Top 20%
SPSpx: 1 patents #217 of 468Top 50%
General Motors: 1 patents #9,441 of 18,328Top 55%
Grand Blanc, MI: #68 of 470 inventorsTop 15%
Michigan: #13,705 of 86,293 inventorsTop 20%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
Gary Francis Stack has been granted 7 US patents while listed as an inventor at Delphi Technologies. The first was granted in 1983 and the most recent in February 2003. Gary Francis Stack ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Gary Francis Stack in Grand Blanc, MI, US.

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6520200 Liquid/vapor separator assembly for fuel tank Michael Paul Lawrukovich, Marpessa Randolph 2003-02-18 $2,165,000
6435365 Seal assembly for a fuel tank Mahlon Richard Pachciarz 2002-08-20 $1,398,000
6338420 Motor vehicle fuel tank and method Mahlon Richard Pachciarz, Carlos Gutierrez 2002-01-15 $4,658,000
6260578 Spud assembly for a fuel tank Bruce Albert Kuehnemund, Darrel B. Smith 2001-07-17 $8,454,000
6182693 Vapor canister and fuel tank assembly Michael P. Murphy, Gregory T. Roth 2001-02-06 $17,769,000
D363759 Combined filter and connector Gary L. Schafer 1995-10-31
4423309 Quick heat self regulating electric glow heater Michael P. Murphy, James W. Hoppenrath, John Richard Taylor 1983-12-27 $14,481,000