Inventor
RUFF DAVID L
10 patents
⚠️ This page may combine multiple inventors who share the name “RUFF DAVID L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GREFCO
8 patentsUS4067155AJan 10, 1978
Sealing system
GREFCO387 citations96
US4313997AFeb 2, 1982
Perlite boards and method for making same
GREFCO64 citations93
US4063395ADec 20, 1977
Twin membrane, self sealing, mechanically fastened insulated roof deck system
GREFCO86 citations92
US4059933ANov 29, 1977
Strip for fastening and sealing sheets of construction material
GREFCO99 citations90
US3978264AAug 31, 1976
Coating for porous surfaces
GREFCO21 citations78
US3958373AMay 25, 1976
Twin membrane, self sealing, mechanically fastened insulated roof deck system
GREFCO22 citations78
US4302344ANov 24, 1981
Loose-fill, thermal insulation
GREFCO13 citations69
US4212755AJul 15, 1980
Settle resistant loose-fill perlite insulation comprising particles rendered slightly tacky by a coating thereon
GREFCO12 citations69