DH

Derik Howard

Overall (All Time): #2,351,233 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4495804 Method of and apparatus for mining analysis Guy Le Blanc Smith 1985-01-29
4494106 Pressure monitor Guy L. B. Smith, Anton B. Goedhals 1985-01-15