Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4518397 | Articles containing non-fused aluminum oxide-based abrasive mineral | Harold G. Sowman | 1985-05-21 |
| 4314827 | Non-fused aluminum oxide-based abrasive mineral | Harold G. Sowman | 1982-02-09 |
ML
Melvin A. Leitheiser
Overall (All Time): #2,353,331 of 4,157,543Top 60%
2
Patents All Time