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 51–75 of 105 patents

Patent #TitleCo-InventorsDate
5141262 Means of lowering the operational temperature for elastomeric seals 1992-08-25
5110161 Means of improving performance of swivelling pressure sealing devices 1992-05-05
5069489 Bleed-down connector assembly 1991-12-03
5067754 Swivelable quick connector assembly 1991-11-26
5063968 Swivelable quick connector assembly 1991-11-12
5052723 Locking accommodating sealing port 1991-10-01
5039072 Means for securing a rolling diaphragm on an air adjustable shock absorber 1991-08-13
5033513 Swivelable quick connector assembly 1991-07-23
5031559 Means of providing an air layer between a liquid and solid surface to reduce drag forces 1991-07-16
5031941 Sanitary connectors 1991-07-16
5009454 Swivelable quick connector assembly 1991-04-23
5002315 Quick connector 1991-03-26
5000491 Means for hose clamp replacement 1991-03-19
5001305 Holder to provide pull strength and limit bend radius of brittle conductors 1991-03-19
4991293 Means for providing very small bend radii in the tube-like structures 1991-02-12
4981586 Swivelable quick connector assembly 1991-01-01
4979765 Swivelable quick connector assembly 1990-12-25
4979400 Force and elapsed time recording assembly 1990-12-25
4951975 Coupling for conduits 1990-08-28
4948176 Swivelable quick connector assembly 1990-08-14
4948175 Swivelable quick connector assembly 1990-08-14
4944536 Bleed-down connector assembly 1990-07-31
4943091 Quick connector 1990-07-24
4936544 Swivelable quick connector assembly 1990-06-26
4923226 Apparatus for attaching a hose to a fitting 1990-05-08