Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Stuart D. Howkins — 15 Patents

ExxonMobil: 6 patents #1,830 of 10,161Top 20%
DPData Products: 2 patents #28 of 148Top 20%
HCHitachi Koki Co.: 1 patents #557 of 888Top 65%
HSHitachi Koki Imaging Solutions: 1 patents #4 of 17Top 25%
Ricoh Company: 1 patents #6,943 of 9,818Top 75%
Exeter, NH: #16 of 228 inventorsTop 8%
New Hampshire: #917 of 12,181 inventorsTop 8%
Overall (All Time): #307,048 of 4,157,543Top 8%
15 Patents All Time
Stuart D. Howkins has been granted 15 US patents while listed as an inventor at ExxonMobil. The first was granted in 1984 and the most recent in April 2018. Stuart D. Howkins ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list Stuart D. Howkins in Exeter, NH, US.

Issued Patents All Time

Showing 1–15 of 15 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
9944070 Determination of a maximum jetting frequency for an inkjet head Charles A. Willus 2018-04-17
6932458 Obtaining high frequency performance by controlling chamber pressure Charles A. Willus 2005-08-23
6893112 Structurally isolated inertial transducers for a printing system Charles A. Willus 2005-05-17
6719390 Short delay phased firing to reduce crosstalk in an inkjet printing device Charles A. Willus, Osamu Machida 2004-04-13 $246,000
6394589 Ink jet printhead with reduced crosstalk Charles A. Willus, Nobuhiro Noto, Yoshitaka Akiyama 2002-05-28 $184,000
6050679 Ink jet printer transducer array with stacked or single flat plate element 2000-04-18 $767,000
4973980 Acoustic microstreaming in an ink jet apparatus John A. McCormick 1990-11-27
4788557 Ink jet method and apparatus for reducing cross talk 1988-11-29 $2,482,000
4697193 Method of operating an ink jet having high frequency stable operation 1987-09-29 $53,470,000
4686539 Multipulsing method for operating an ink jet apparatus for printing at high transport speeds Lisa M. Schmidle 1987-08-11
4646106 Method of operating an ink jet 1987-02-24 $206,584,000
4593291 Method for operating an ink jet device to obtain high resolution printing 1986-06-03 $11,170,000
4523200 Method for operating an ink jet apparatus 1985-06-11 $16,388,000
4509059 Method of operating an ink jet 1985-04-02 $12,572,000
4459601 Ink jet method and apparatus 1984-07-10 $22,767,000