DB

Donald D. Bartholomew

PT Proprietary Technology: 8 patents #1 of 1Top 100%
📍 Marine City, MI: #1 of 4 inventorsTop 25%
🗺 Michigan: #6 of 3,452 inventorsTop 1%
Overall (1989): #844 of 140,708Top 1%
8
Patents 1989

Issued Patents 1989

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
4859194 Spark plug connector 1989-08-22
4852239 Method of affixing a ring to plastic pipe 1989-08-01
4843686 Hose clamp 1989-07-04
4823844 Fluid pressure surge damper for a fluid system 1989-04-25
4807913 Heat blocking junction 1989-02-28
4805467 Force recording seat belt assembly 1989-02-21
4804020 Conduit liner assembly and method for installation 1989-02-14
4802697 Means of locking tubes into engagement with a pressure fitting 1989-02-07