DR

David A. Ratner

BM Brod & Mcclung--Pace: 1 patents #4 of 6Top 70%
SC Sinko Kogyo Co.: 1 patents #7 of 14Top 50%
Overall (All Time): #1,645,168 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5681143 Damper control system for centrifugal fan — 1997-10-28
5161941 Actuator assembly for controlling inlet air flow to centrifugal fans — 1992-11-10
4312381 Air flow damping system — 1982-01-26