Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
LH

Leland A. Hardcastle

PGPoco Graphite: 1 patents #1 of 3Top 35%
Decatur, TX: #1 of 4 inventorsTop 25%
Texas: #2,449 of 8,709 inventorsTop 30%
Overall (2003): #172,603 of 273,478Top 65%
1 Patents 2003

Issued Patents 2003

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6576168 Process for making carbon foam induced by process depressurization Rex Gerald Sheppard, David F. Dingus 2003-06-10