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USPTO Patent Rankings Data through Dec 31, 2025
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Charles B. Hood — 8 Patents

PTPhpk Technologies: 4 patents #1 of 4Top 25%
CICvi Incorporated: 3 patents #2 of 9Top 25%
Columbus, OH: #407 of 3,880 inventorsTop 15%
Ohio: #10,270 of 73,341 inventorsTop 15%
Overall (All Time): #600,572 of 4,157,543Top 15%
8 Patents All Time
Charles B. Hood has been granted 8 US patents while listed as an inventor at Phpk Technologies. The first was granted in 1982 and the most recent in November 2005. Charles B. Hood ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Charles B. Hood in Columbus, OH, US.

Patents per Year

Patents granted per year, 1982 to 2005Bar chart with a peak of 1 patents in 1982.peak 11982: 1 patents19821984: 1 patents19841986: 1 patents19861996: 1 patents19961997: 1 patents19971999: 1 patents19992003: 1 patents20032005: 1 patents2005

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
6968704 Method and system for densifying cryogenic propellants 2005-11-29
6532750 Method and system for densifying cryogenic propellants 2003-03-18
RE36332 Refrigeration of superconducting magnet system James Pierce, Sibley C. Burnett, John R. Purcell 1999-10-12
5697220 Refrigeration of superconducting magnet systems James Pierce, Sibley C. Burnett, John R. Purcell 1997-12-16
5495718 Refrigeration of superconducting magnet systems James Pierce, Sibley C. Burnett, John R. Purcell 1996-03-05
4584839 Multi-stage cryogenic refrigerators Jack E. Jensen, Harold Parish 1986-04-29
4466252 Cryopump 1984-08-21
4346563 Super critical helium refrigeration process and apparatus 1982-08-31