Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Carl D. Griffith — 14 Patents

SPSperry: 7 patents #35 of 841Top 5%
ASAmerican Sigma: 3 patents #6 of 26Top 25%
BTBell Helicopter Textron: 2 patents #220 of 718Top 35%
Colleyville, TX: #43 of 333 inventorsTop 15%
Texas: #10,699 of 125,132 inventorsTop 9%
Overall (All Time): #332,869 of 4,157,543Top 9%
14 Patents All Time
Carl D. Griffith has been granted 14 US patents while listed as an inventor at Sperry. The first was granted in 1980 and the most recent in July 2020. Carl D. Griffith ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Carl D. Griffith in Colleyville, TX, US.

Issued Patents All Time

Showing 1–14 of 14 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10712752 High authority stability and control augmentation system Brady Garrett Atkins, James E. Harris 2020-07-14
9868522 Rotorcraft autopilot control Brady Garrett Atkins, Awais Raza, Paul M. Wilson 2018-01-16 $9,279,000
9870004 High authority stability and control augmentation system Brady Garrett Atkins, James E. Harris 2018-01-16 $9,279,000
5172332 Automatic fluid sampling and monitoring apparatus and method William G. Hungerford, Donald Lee Miller, Donald F. Kaiser 1992-12-15
5091863 Automatic fluid sampling and flow measuring apparatus and method William G. Hungerford, Donald Lee Miller, Donald F. Kaiser 1992-02-25
4930988 Individual blade control system for helicopters 1990-06-05
4660607 Sensor controlled sampling apparatus and method Ray P. McGranor 1987-04-28
4603388 VTOL altitude hold system with automatic ground effect compensation Edmund R. Skutecki 1986-07-29 $9,486,000
4603389 Three cue flight director system for helicopters Edmund R. Skutecki 1986-07-29 $9,486,000
4551804 Approach to hover control system for helicopters Thomas R. Clark 1985-11-05 $2,649,000
4490794 Altitude preselect system for aircraft without air data computer Paul A. Rauschelbach, Robert Wilson Robinson, Edmund R. Skutecki 1984-12-25
4460964 Multiaxis hardover protection apparatus for automatic flight control systems Edmund R. Skutecki, Robert A. Bowie 1984-07-17 $2,828,000
4345195 Strapdown multifunction servoactuator apparatus for aircraft Kenneth Oliver 1982-08-17 $870,000
4228386 Aircraft servoactuator apparatus 1980-10-14 $1,964,000