Robert B. Champ has been granted 7 US patents while listed as an inventor at IBM . The first was granted in 1981 and the most recent in December 1999. Robert B. Champ ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Robert B. Champ in Boulder, CO, US.
Patents per Year Patents granted per year, 1981 to 1999 Bar chart with a peak of 1 patents in 1981. peak 1 1981: 1 patents 1981 1982: 1 patents 1982 1984: 1 patents 1984 1987: 1 patents 1987 1989: 1 patents 1989 1992: 1 patents 1992 1999: 1 patents 1999
Issued Patents All Time
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Showing 1–7 of 7 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
6004708 Electrophotographic photoconductor containing fluorenyl-azine derivatives as charge transport additives Mark Thomas Bellino , Weimei Luo 1999-12-21
$23,195,000
5130217 Squarylium photoconductors with noncrystalline bisphenol a binders Donald A. Stremel 1992-07-14
4889784 Organic photoconductors with improved wear Meredith D. Shattuck , Donald A. Stremel 1989-12-26
$15,291,000
4677045 Squarylium charge generating dye and electrophotographic photoconductor Robert L. Vollmer 1987-06-30
$29,011,000
4490452 Xerographic photoconductors with cross-linked epoxy binder Yau T. Chen 1984-12-25
4362798 Hydrazone and pyrazoline or acetosol yellow containing charge transport layer, photoconductor and electrophotographic process using the same Howard W. Anderson 1982-12-07
$16,213,000
4307167 Layered electrophotographic plate having tetramethyl benzidene based disazo dye Larry D. Bowden , Michael Thomas Moore 1981-12-22
$15,489,000
