Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DC

David J. Crorey — 39 Patents

UNUnknown: 8 patents #1,262 of 83,584Top 2%
INIsi Norgren: 5 patents #2 of 6Top 35%
NANorgren Automotive: 5 patents #1 of 9Top 15%
Clinton Township, MI: #3 of 448 inventorsTop 1%
Michigan: #1,412 of 86,293 inventorsTop 2%
Overall (All Time): #81,519 of 4,157,543Top 2%
39 Patents All Time

Issued Patents All Time

Showing 26–39 of 39 patents

Patent #TitleCo-InventorsDate
6142725 Rotatable shuttle transfer unit 2000-11-07
6070864 Electric power operated positioning apparatus 2000-06-06
6003850 Electric power operated clamp 1999-12-21
5924545 Rotatable shuttle transfer unit 1999-07-20
5738203 Apparatus for translating harmonic motion 1998-04-14
5632588 Automatic tool changer Leland D. Blatt 1997-05-27
5549442 Article transfer apparatus 1996-08-27
5509777 Mechanical side shift and tip apparatus Leland D. Blatt 1996-04-23
5492443 Apparatus for handling a workpiece between work stations Leland D. Blatt 1996-02-20
5452981 Automatic tool changer Leland D. Blatt 1995-09-26
5222854 Automatic tool changer Leland D. Blatt 1993-06-29
5174709 Workpiece transfer device John A. Blatt 1992-12-29
5051055 Article lifting device John A. Blatt 1991-09-24
4518187 Parallel movement gripper head Leland F. Blatt 1985-05-21