BE

by Peggy Anastas, executrix

BT Bell Helicopter Textron: 1 patents #349 of 718Top 50%
📍 Swarthmore, PA: #116 of 189 inventorsTop 65%
🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%
Overall (All Time): #3,880,804 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5031858 Apparatus and method for folding and locking rotor blades Ernst C. Schellhase, Dan Anastas, deceased, Paul E. Keefer, Cecil E. Covington, Joseph John Zierer +1 more 1991-07-16