Inventor
KOOPMAN DONALD E
US6 patents
⚠️ This page may combine multiple inventors who share the name “KOOPMAN DONALD E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VECTRA INTERNATIONAL CORP
3 patentsUS4433637AFeb 28, 1984
Microencapsulated cholesteric liquid crystal temperature measuring device for determining the temperature of non-planar or planar surfaces
VECTRA INTERNATIONAL CORP43 citations90
US4501503AFeb 26, 1985
Thermographic cholesteric coating compositions and plates
VECTRA INTERNATIONAL CORP24 citations79
US4441508AApr 10, 1984
Thermographic cholesteric coating compositions and plates
VECTRA INTERNATIONAL CORP20 citations79