Inventor · disambiguated record
Charles D. Welker
Also filed as: WELKER CHARLES D · Welker Charles David
6 granted patents·7 pending applications·77 citations·filing 1999–2020
82Inventor score
Top patents by PatentIndex Score
13 records- 0187US10689302B2System, method and apparatus for entraining air in concreteMACH IV LLC·Filed 2017·Granted Jun 23, 2020·3 cites·12 claims
- 0286US8408781B2System, method and apparatus for entraining air in concreteWELKER CHARLES D·Filed 2010·Granted Apr 2, 2013·10 cites·20 claims
- 0384US10532954B2System, method and apparatus for entraining air in concreteMACH IV LLC·Filed 2017·Granted Jan 14, 2020·3 cites·3 claims
- 0481US9593050B2System, method and apparatus for entraining air in concreteMACH IV LLC·Filed 2013·Granted Mar 14, 2017·5 cites·14 claims
- 0577US6153005AFoamed concrete composition and processWELKER CHARLES D·Filed 1999·Granted Nov 28, 2000·56 cites·24 claims
- 0670US2020283345A1System, method and apparatus for entraining air in concreteMACH IV LLC·Filed 2020·Application pending·0 cites
- 0751US2013148459A1System, method and apparatus for entraining air in concreteWELKER CHARLES D·Filed 2013·Application pending·0 cites
- 0845US2008028988A1Method and apparatus for making air-entrained or cellular high-strengthconcreteWELKER CHARLES D·Filed 2007·Application pending·0 cites
- 0945US2015175887A1Fire core compositions and methodsMACH IV LLC·Filed 2014·Application pending·0 cites
- 1041US9481607B2System, method and apparatus for manufacturing stable cement slurry for downhole injectionMACH IV LLC·Filed 2013·Granted Nov 1, 2016·0 cites·15 claims
- 1139US2009075073A1Light weight concrete product containing synthetic fibersBIDDLE DANIEL T·Filed 2007·Application pending·0 cites
- 1238US2017341988A1System and method for disposing carbon dioxideMACH IV L L C·Filed 2017·Application pending·0 cites
- 1334US2015240163A1Fire core compositions and methodsMACH IV LLC·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →