Inventor

CAMPBELL DUANE

US4 patents

⚠️ This page may combine multiple inventors who share the name “CAMPBELL DUANE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MICROSOFT CORP

2 patents

US7533139B2May 12, 2009

Method and system for multithread processing of spreadsheet chain calculations

MICROSOFT CORP10 citations81

US8032821B2Oct 4, 2011

Multi-thread spreadsheet processing with dependency levels

MICROSOFT CORP7 citations80

MICROSOFT TECHNOLOGY LICENSING LLC

2 patents

US10331775B2Jun 25, 2019

Collaborative document editing using state-based revision

MICROSOFT TECHNOLOGY LICENSING LLC6 citations77

US10936797B2Mar 2, 2021

Collaborative document editing using state-based revision

MICROSOFT TECHNOLOGY LICENSING LLC0 citations56