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John A. Springer

UA US Army: 1 patents #2,720 of 6,974Top 40%
📍 Alexandria, VA: #959 of 1,823 inventorsTop 55%
🗺 Virginia: #18,729 of 34,511 inventorsTop 55%
Overall (All Time): #4,025,042 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4554648 Electronic earth seismic noise measuring method Charles B. Greer, Donald W. Keehan 1985-11-19