Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DS

David Stewart — 28 Patents

RARarecyte: 19 patents #5 of 22Top 25%
Xerox: 4 patents #2,608 of 8,622Top 35%
ZEZenith Electronics: 3 patents #112 of 411Top 30%
Williamsville, NY: #14 of 663 inventorsTop 3%
New York: #4,459 of 115,490 inventorsTop 4%
Overall (All Time): #134,628 of 4,157,543Top 4%
28 Patents All Time
David Stewart has been granted 28 US patents while listed as an inventor at Rarecyte. The first was granted in 1981 and the most recent in June 2025. David Stewart ranks #134,628 of 4,157,543 US inventors in our database (top 3.2%). Patent records list David Stewart in Williamsville, NY, US.

Issued Patents All Time

Showing 1–25 of 28 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12327971 Light bulb and power adapter combination having an Edison screw Joseph Stewart 2025-06-10
12222487 Holding a substrate within a secondary device Steve Quarre 2025-02-11
11719929 Optical trains for imaging systems and spectral edge detection Jeremy R. Cooper 2023-08-08
11573415 Device, system, and method for changing angle of incidence of a filter or filter wheel 2023-02-07
11422352 Automated substrate loading Steve Quarre, Edward Shafer, Joel Smith 2022-08-23
11300769 Automated substrate loading Steve Quarre, Edward Shafer, Joel Smith 2022-04-12
11237377 Apparatus for holding a substrate within a secondary device Steve Quarre 2022-02-01
10890748 Automated substrate loading Steve Quarre, Edward Shafer, Joel Smith 2021-01-12
10802260 Automated substrate loading Steve Quarre, Edward Shafer, Joel Smith 2020-10-13
10054524 Apparatus, system and method for collecting a target material Daniel Campton, Joshua Nordberg, Steve Quarre, Ronald Seubert, Jonathan Lundt +2 more 2018-08-21
10018538 Apparatus for spreading a fluid across a substrate and method of using the same Joshua Nordberg, Daniel Campton, Steve Quarre 2018-07-10
9945839 Apparatus, system, and method for collecting a target material Daniel Campton, Joshua Nordberg, Steve Quarre, Ronald Seubert 2018-04-17
9857580 Apparatus for holding a substrate within a secondary device Steve Quarre 2018-01-02
9541481 Apparatus, system, and method for collecting a target material Daniel Campton, Joshua Nordberg, Steve Quarre, Ronald Seubert, Jonathan Lundt +2 more 2017-01-10
9533303 Apparatus, system, and method for collecting a target material Daniel Campton, Joshua Nordberg, Steve Quarre, Ronald Seubert, Jonathan Lundt +1 more 2017-01-03
9513291 Apparatus, system, and method for collecting a target material Daniel Campton, Joshua Nordberg, Steve Quarre, Ronald Seubert, Jonathan Lundt +2 more 2016-12-06
9492819 Apparatus, system, and method for collecting a target material Daniel Campton, Joshua Nordberg, Steve Quarre, Ronald Seubert, Jonathan Lundt +1 more 2016-11-15
9222857 Apparatus for spreading a fluid across a substrate and method of using the same Joshua Nordberg, Daniel Campton, Steve Quarre 2015-12-29
9121798 Apparatus for spreading a fluid across a substrate and method of using the same Joshua Nordberg, Daniel Campton, Steve Quarre 2015-09-01
9039999 Apparatus, system, and method for collecting a target material Daniel Campton, Joshua Nordberg, Steve Quarre, Ronald Seubert, Jonathan Lundt +1 more 2015-05-26
8448078 Method and apparatus for selection of default media based on media size in an image production device 2013-05-21 $5,885,000
8446643 Method and apparatus for detecting a size and shape of media on which image data is to be printed in an image production device 2013-05-21 $5,885,000
8339618 Method and apparatus for confirming attributes of media loaded in a media tray in an image production device Gemma Rosalind Lee, Lee O'Brien 2012-12-25
8123213 Sheet size detection device Richard Thomas Calhoun Bridges 2012-02-28 $2,625,000
5579597 Combined door and display panel for consumer electronics products 1996-12-03 $22,775,000