LZ

L. Robert Zifferer

PH Packless Metal Hose: 7 patents #1 of 3Top 35%
📍 Waco, TX: #18 of 293 inventorsTop 7%
🗺 Texas: #16,798 of 125,132 inventorsTop 15%
Overall (All Time): #578,203 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
8434207 Corrugated conduit and method of expanding to form a lined tubular member Edward A. Reed 2013-05-07
7926160 Method of forming a lined tubular member Edward A. Reed 2011-04-19
7694402 Method for forming a lined conduit Edward A. Reed 2010-04-13
6968719 Apparatus and methods for forming internally and externally textured tubing 2005-11-29
6923035 Method and apparatus for forming a modified conduit Edward A. Reed 2005-08-02
6760972 Apparatus and methods for forming internally and externally textured tubing 2004-07-13
6488079 Corrugated heat exchanger element having grooved inner and outer surfaces 2002-12-03
5551504 Heat exchange element 1996-09-03
5409057 Heat exchange element 1995-04-25