Inventor
CARLSON LENNART L
US7 patents
Patents
7 patentsUS5848223ADec 8, 1998
Double-walled flexible tubing product with helical support bead and heating conductor and apparatus and method for making
STEWARD PLASTICS139 citations97
US5637168AJun 10, 1997
Apparatus and method for making flexible tubing with helically wound heating conductor
STEWARD PLASTICS152 citations97
US5454061ASep 26, 1995
Apparatus and method for making flexible tubing with helically wound heating conductor
STEWARD PLASTICS214 citations97
US6190480B1Feb 20, 2001
Method of making a double-walled flexible tubing product with helical support bead and heating conductor
STEWARD PLASTICS104 citations96
US4337800AJul 6, 1982
Two piece extruded hose
STEWARD PLASTICS81 citations93
US3963856AJun 15, 1976
Flexible, corrugated, plastic tubing having conductive helical bead
STEWARD PLASTICS136 citations93
US4375381AMar 1, 1983
Two piece extruded hose
STEWARD PLASTICS32 citations90