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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Napp Systems › David Roberts
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David Roberts — 17 Patents

NSNapp Systems: 8 patents #1 of 17Top 6%
DUDuke University: 2 patents #648 of 2,315Top 30%
UEUS Dept of Energy: 2 patents #577 of 5,099Top 15%
Ricoh Company: 1 patents #6,943 of 9,818Top 75%
Durham, NC: #274 of 4,103 inventorsTop 7%
North Carolina: #2,803 of 45,564 inventorsTop 7%
Overall (All Time): #263,971 of 4,157,543Top 7%
17 Patents All Time
David Roberts has been granted 17 US patents while listed as an inventor at Napp Systems. The first was granted in 1982 and the most recent in August 2010. David Roberts ranks #263,971 of 4,157,543 US inventors in our database (top 6.3%). Patent records list David Roberts in Durham, NC, US.

Patents per Year

Patents granted per year, 1982 to 2010Bar chart with a peak of 3 patents in 2006.peak 31982: 1 patents19821984: 1 patents1992: 1 patents19921993: 1 patents1997: 1 patents19971999: 1 patents2003: 1 patents20032004: 1 patents2006: 3 patents20062007: 3 patents2009: 2 patents20092010: 1 patents2010

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDate
7767383 Method of pre-exposing relief image printing plate Gary T. Markhart 2010-08-03
7632625 Method of pre-exposing relief image printing plate Gregory E. Mueller 2009-12-15
7498114 Toner, process of manufacturing toner, developer, toner container, process cartridge, image forming apparatus, and image forming process Nobuyasu Makino, Fumitoshi Murakami, Colin Weaver, Tsutomu Kagawa 2009-03-03
7241124 Apparatus for the rapid development of photosensitive printing elements Donald Cerney 2007-07-10
7217756 High performance water-based primer Geoffrey Yuxin Hu, Elizabeth Olsen 2007-05-15
7156630 Apparatus for the rapid development of photosensitive printing elements Donald Cerney 2007-01-02
7125650 Method for bump exposing relief image printing plates Gregory E. Mueller 2006-10-24
7083896 Highly reflective substrates for the digital processing of photopolymer printing plates Geoffrey Yuxin Hu 2006-08-01
7005232 Highly reflective substrates for the digital processing of photopolymer printing plates Geoffrey Yuxin Hu 2006-02-28
6780566 High performance, photoimageable resin compositions and printing plates prepared therefrom Yuxin Hu, Reny R. Paguio, Maria Teresa A. Castillo 2004-08-24
6579664 High performance, photoimageable resin compositions and printing plates prepared therefrom Yuxin Hu, Reny R. Paguio, Maria Teresa A. Castillo 2003-06-17
5976763 Highly sensitive water-developable photoreactive resin compositions and printing plates prepared therefrom Mitch G. Male 1999-11-02
5683837 Water-soluble compositions for preparation of durable, high-resolution printing plates Maria Teresa A. Castillo 1997-11-04
5264959 Temperature-insensitive phase-matched optical harmonic conversion crystal Charles E. Barker, David Eimerl, Stephan P. Velsko 1993-11-23
5099490 Method for reducing energy losses in laser crystals L. Jeffrey Atherton, James J. DeYoreo 1992-03-24
4464304 Vinyl Cyclopropyl compounds as precursors to fatty acid oxidation products Ned A. Porter, Carl Bernard Ziegler 1984-08-07
4350834 Vinyl cyclopropyl compounds as precursors to fatty acid oxidation products Ned A. Porter, Carl Bernard Ziegler 1982-09-21

Frequent Collaborators

Maria Teresa A. Castillo3 shared
Geoffrey Yuxin Hu3 shared
Donald Cerney2 shared
Ned A. Porter2 shared
Gregory E. Mueller2 shared
Carl Bernard Ziegler2 shared

Nearby-Ranked Inventors

Michael John Caelwaerts17
Umut Zalluhoglu17
Austino Longo17
Till Bredbeck17
Mircea Grigore17
Achim Klein17
Manesh Nadupparambil Sekharan17
Yoshiaki Nishikawa17
Evan Sparks17