Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Khem Garewal — 10 Patents

ZEZenith Electronics: 5 patents #70 of 411Top 20%
GE: 3 patents #10,387 of 36,430Top 30%
IMImatron: 2 patents #6 of 22Top 30%
Hoffman Estates, IL: #102 of 707 inventorsTop 15%
Illinois: #9,022 of 84,256 inventorsTop 15%
Overall (All Time): #481,000 of 4,157,543Top 15%
10 Patents All Time
Khem Garewal has been granted 10 US patents while listed as an inventor at Zenith Electronics. The first was granted in 1984 and the most recent in October 2005. Khem Garewal ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Khem Garewal in Hoffman Estates, IL, US.

Patents per Year

Patents granted per year, 1984 to 2005Bar chart with a peak of 2 patents in 2005.peak 21984: 1 patents19841985: 1 patents19851987: 1 patents19871988: 1 patents19881989: 1 patents19891998: 1 patents19982001: 1 patents20012003: 1 patents20032005: 2 patents2005

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6952466 Oil-free electron source for an EBT scanner Roy E. Rand, Thomas Clarke Sanders 2005-10-04 $54,488,000
6891321 Oil-free electron source having cathode and anode members adjustable with five degrees of freedom Thomas Clarke Sanders, Roy E. Rand 2005-05-10 $31,661,000
6670625 Method and apparatus for correcting multipole aberrations of an electron beam in an EBT scanner Roy E. Rand 2003-12-30 $42,246,000
6208711 Method and apparatus for clearing ions in a scanning electron beam computed tomographic system using a single potential power source Roy E. Rand, James F. Heilman 2001-03-27 $3,682,000
5719914 Method for correcting spherical aberration of the electron beam in a scanning electron beam computed tomography system Roy E. Rand, Glenn R. James 1998-02-17 $7,124,000
4795391 Means and method of forming aligned apertures in electron guns Allen P. Blacker 1989-01-03 $5,376,000
4771216 Electron gun system providing for control of convergence, astigmatism and focus with a single dynamic signal Allen P. Blacker 1988-09-13 $4,085,000
4704565 Dynamically converging electron gun system Allen P. Blacker, John A. Christensen 1987-11-03 $1,492,000
4529910 High-performance electron gun Arthur J. Ingle 1985-07-16 $1,712,000
4469987 Means for enhancing brightness of a monochrome CRT without loss of resolution Allen P. Blacker 1984-09-04 $4,292,000