Inventor · disambiguated record
Duane Campbell
Also filed as: CAMPBELL DUANE
4 granted patents·23 citations·filing 2004–2019
72Inventor score
Technology areasG06F
Top patents by PatentIndex Score
4 records- 0178US10331775B2Collaborative document editing using state-based revisionMICROSOFT TECHNOLOGY LICENSING LLC·Filed 2014·Granted Jun 25, 2019·6 cites·20 claims
- 0271US8032821B2Multi-thread spreadsheet processing with dependency levelsMICROSOFT CORP·Filed 2006·Granted Oct 4, 2011·7 cites·20 claims
- 0362US7533139B2Method and system for multithread processing of spreadsheet chain calculationsMICROSOFT CORP·Filed 2004·Granted May 12, 2009·10 cites·19 claims
- 0456US10936797B2Collaborative document editing using state-based revisionMICROSOFT TECHNOLOGY LICENSING LLC·Filed 2019·Granted Mar 2, 2021·0 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →