Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Larry E. Drafall — 4 Patents

MMMemc Electronic Materials: 4 patents #50 of 273Top 20%
Holden, MO: #220 of 898 inventorsTop 25%
Missouri: #5,303 of 23,789 inventorsTop 25%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Larry E. Drafall has been granted 4 US patents while listed as an inventor at Memc Electronic Materials. The first was granted in 1998 and the most recent in September 2002. Larry E. Drafall ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Larry E. Drafall in Holden, MO, US.

Patents per Year

Patents granted per year, 1998 to 2002Bar chart with a peak of 2 patents in 1999.peak 21998: 1 patents19981999: 2 patents19992002: 1 patents2002

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6447601 Crystal puller and method for growing monocrystalline silicon ingots Richard J. Phillips, Kirk D. McCallum 2002-09-10 $31,215,000
5980629 Methods for improving zero dislocation yield of single crystals Richard L. Hansen, Robert M. McCutchan, John D. Holder, Leon A. Allen, Robert D. Shelley 1999-11-09 $22,814,000
5976247 Surface-treated crucibles for improved zero dislocation performance Richard L. Hansen, Robert M. McCutchan, John D. Holder, Leon A. Allen, Robert D. Shelley 1999-11-02 $7,983,000
5779791 Process for controlling thermal history of Czochralski-grown silicon Harold W. Korb, Sadasivam Chandrasekhar, Robert J. Falster, Joseph C. Holzer, Kyong-Min Kim +1 more 1998-07-14 $5,217,000