Individual holder
WELKER CHARLES D
US·2 granted patents·2 pending applications·66 citations·filing 1999–2013
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0186US8408781B2System, method and apparatus for entraining air in concreteWELKER CHARLES D·Filed 2010·Granted Apr 2, 2013·10 cites·20 claims
- 0277US6153005AFoamed concrete composition and processWELKER CHARLES D·Filed 1999·Granted Nov 28, 2000·56 cites·24 claims
- 0351US2013148459A1System, method and apparatus for entraining air in concreteWELKER CHARLES D·Filed 2013·Application pending·0 cites
- 0445US2008028988A1Method and apparatus for making air-entrained or cellular high-strengthconcreteWELKER CHARLES D·Filed 2007·Application pending·0 cites
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →