Inventor

DREYER PAUL L

US3 patents

⚠️ This page may combine multiple inventors who share the name “DREYER PAUL L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ECOLAIRE INC

2 patents

US4561472ADec 31, 1985

Sliding blade closure apparatus with inflatable sealing ring

ECOLAIRE INC17 citations71

US4474205AOct 2, 1984

Sliding blade apparatus for closing conduits

ECOLAIRE INC17 citations67

DREYER PAUL L

1 patent

US4491144AJan 1, 1985

Flexible seals for sliding blade dampers

DREYER PAUL L21 citations69