DJ

David L. Durfee, Jr.

UN Unknown: 6 patents #2,010 of 83,584Top 3%
PA Parlec: 3 patents #1 of 6Top 20%
T& T&E: 1 patents #4 of 8Top 50%
📍 Meadville, PA: #3 of 150 inventorsTop 2%
🗺 Pennsylvania: #2,146 of 74,527 inventorsTop 3%
Overall (All Time): #141,477 of 4,157,543Top 4%
27
Patents All Time

Issued Patents All Time

Showing 1–25 of 27 patents

Patent #TitleCo-InventorsDate
12301746 Retractable grip element for cell phones 2025-05-13
12295305 Modular raised garden bed system 2025-05-13
12238233 Grip shield for cell phones 2025-02-25
10368628 Cell phone accessories 2019-08-06
9441654 Precision positioning and fastening system 2016-09-13
9427862 Quick connect and adjustment hand implement system 2016-08-30
8740528 Precision positioning and fastening system 2014-06-03
7686553 Precision positioning and fastening system 2010-03-30
7083166 Light-weight, modular work-holding chassis 2006-08-01
6896643 Abdominal exercise machine 2005-05-24
6619895 Machine spindle actuating indexing unit 2003-09-16
6409161 Double station hydraulically operated machining vise Bradley D. Wolff, Matthew Hoyt 2002-06-25
6250620 Maching vise 2001-06-26
6244580 Machining vise 2001-06-12
6017026 Machining vise 2000-01-25
5984290 Enclosed two station machining vise with removable and off-settable jaws 1999-11-16
5623757 Two station machining vise with removable and off-setting jaws 1997-04-29
5505437 Two station machining vise with removable and off-settable jaws 1996-04-09
5458321 Two station machining vise with removable and off-settable jaws 1995-10-17
5150888 Clamping mechanism in a vise jaw accessory system for attaching and releasing vise accessories while maintaining positional accuracy of the accessories 1992-09-29
5133135 Angle gauge 1992-07-28
5129638 Vise-jaw extension 1992-07-14
5065990 Vise jaw accessory system for attaching and releasing vise accessories while maintaining positional accuracy of the accessories 1991-11-19
5037075 Quick lock in parallel and angle plate system for machining vise 1991-08-06
4993167 Dressing tool gauge for positioning cutting tools in removable head type dressers 1991-02-19