David A. Schaefer

📍 Grand Island, NY: #111 of 278 inventorsTop 40%

🗺 New York: #38,318 of 115,490 inventorsTop 35%

Overall (All Time): #1,651,203 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
5421621	Packing manifold for slip-type expansion joints	—	1995-06-06
5299841	Safety flow restrictor for expansion joints	—	1994-04-05
4526409	Expansion joint	—	1985-07-02