Inventor
CAMPBELL DONALD B
US10 patents
⚠️ This page may combine multiple inventors who share the name “CAMPBELL DONALD B”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FLEXIBLE TECH INC
4 patentsUS10767892B2Sep 8, 2020
Insulated flexible duct using compressible core spacer and method of use
FLEXIBLE TECH INC2 citations69
US10295218B2May 21, 2019
Insulated duct with air gap and method of use
FLEXIBLE TECH INC1 citations59
US11035501B2Jun 15, 2021
Insulated duct with air gap and method of use
FLEXIBLE TECH INC0 citations55
US10352482B2Jul 16, 2019
Insulated duct with air gap and method of use
FLEXIBLE TECH INC1 citations55