DB

Donald D. Bartholomew

PT Proprietary Technology: 99 patents #1 of 1Top 100%
📍 Marine City, MI: #1 of 44 inventorsTop 3%
🗺 Michigan: #215 of 86,293 inventorsTop 1%
Overall (All Time): #13,249 of 4,157,543Top 1%
105
Patents All Time

Issued Patents All Time

Showing 101–105 of 105 patents

Patent #TitleCo-InventorsDate
4508234 Manually releasable drainport closure apparatus 1985-04-02
4423892 Swivelable quick connector assembly 1984-01-03
4310185 Quick connector for tubing 1982-01-12
4257192 Window regulator and drive assembly 1981-03-24
4182078 Window regulator and drive assembly 1980-01-08