JK

John E. Kercheval

HT Helix Technology: 1 patents #58 of 132Top 45%
📍 Natick, MA: #534 of 819 inventorsTop 70%
🗺 Massachusetts: #56,664 of 88,656 inventorsTop 65%
Overall (All Time): #4,077,522 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4355519 Split ring seal for cryogenic refrigerator Harry G. Nicoll 1982-10-26