LJ

Llewellyn L. Johnston

CM Columbia Machine: 8 patents #4 of 33Top 15%
WS Westblock Systems: 5 patents #3 of 9Top 35%
📍 Vancouver, WA: #162 of 1,812 inventorsTop 9%
🗺 Washington: #7,221 of 76,902 inventorsTop 10%
Overall (All Time): #347,924 of 4,157,543Top 9%
14
Patents All Time

Issued Patents All Time

Showing 1–14 of 14 patents

Patent #TitleCo-InventorsDate
10245756 Mold assembly for concrete products forming machine Stacy Gildersleeve 2019-04-02
10066300 Enhanced release compression shoe for use with concrete product forming machines 2018-09-04
D622416 Portion of a mold insert for forming concrete blocks James E. Hammer 2010-08-24
D610268 Insert for mold for forming concrete blocks James E. Hammer 2010-02-16
7635261 Large pallet machine for forming molded products Douglas Vernon High, Stacy Gildersleeve, Daniel Wahlstrom, Keith Donald Brewer 2009-12-22
7591447 Wall block, system and mold for making the same James E. Hammer 2009-09-22
D595867 Insert for mold for forming concrete blocks James E. Hammer 2009-07-07
7100886 Apparatus and methods for making a masonry block with a roughened surface James E. Hammer 2006-09-05
6007321 Unitary paver mold Kevin Meckel, Alan Hoskins, Kevin T. Litterell, Ronald J. Rowland, Brendan D. Scully 1999-12-28
5939104 Apparatus for forming a multilevel concrete product 1999-08-17
5866026 Method and apparatus for accommodating tolerances in a mold for concrete products 1999-02-02
5743510 Self-aligning mold box assembly 1998-04-28
5648009 Apparatus for adjustably mounting a mold box 1997-07-15
5542837 Mold box assembly with partition plates 1996-08-06