Assignee
ASPHALT & CHEMISCHE FAB
NL·3 granted patents·45 citations·filing 1988–1989
Top patents by PatentIndex Score
3 records- 0168US5000999ABituminous roof covering materialASPHALT & CHEMISCHE FAB·Filed 1989·Granted Mar 19, 1991·39 cites·7 claims
- 0234US4874652APerforated roofing material and a method of manufacturing the sameASPHALT & CHEMISCHE FAB·Filed 1988·Granted Oct 17, 1989·5 cites·4 claims
- 0325US4940501AMethod of manufacturing a perforated roofing materialASPHALT & CHEMISCHE FAB·Filed 1989·Granted Jul 10, 1990·1 cites·12 claims
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