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

John Calhoun — 10 Patents

Apple: 6 patents #4,834 of 18,612Top 30%
Groves, TX: #1 of 40 inventorsTop 3%
Texas: #15,343 of 125,132 inventorsTop 15%
Overall (All Time): #481,000 of 4,157,543Top 15%
10 Patents All Time
John Calhoun has been granted 10 US patents while listed as an inventor at Apple. The first was granted in 1994 and the most recent in September 2013. John Calhoun ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list John Calhoun in Groves, TX, US.

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
D689040 Speaker enclosure 2013-09-03
7336285 Method and system for maintaining fidelity of color correction information with displays Ian C. Hendry, David Hayward, Eric C. Anderson 2008-02-26 $341,219,000
7019758 Method and system for maintaining fidelity of color correction information with displays Ian C. Hendry, David Hayward, Eric W. Anderson 2006-03-28 $155,621,000
6587116 Method and system for maintaining fidelity of color correction information with displays Ian C. Hendry, David Hayward, Eric W. Anderson 2003-07-01 $18,499,000
6279043 Method and system for script access to API functionality David Hayward, Steve Swen 2001-08-21 $118,548,000
6272649 Method and system for ensuring cache file integrity David Hayward, Steve Swen 2001-08-07 $127,489,000
5847794 Photovoltaic module with display indicator David Kulik, Martin Charles, Morton Schiff 1998-12-08 $1,088,000
5819303 Information management system which processes multiple languages having incompatible formats 1998-10-06 $6,548,000
5717478 Photovoltaic module with liquid crystal display indicator David Kulik, Martin Charles, Morton Schiff 1998-02-10 $1,234,000
5329797 Tube-resizing tool 1994-07-19