LJ

Leroy W. Janson

AC Acker Drill Co.: 1 patents #3 of 8Top 40%
Overall (All Time): #3,931,620 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4844184 Lock device for hollow stem augers William L. Acker, III, Richard Pirrami 1989-07-04