Inventor · disambiguated record
Ralph N. Crabtree
Also filed as: CRABTREE RALPH · CRABTREE RALPH N · CRABTREE RALPH NEWTON
13 granted patents·2,184 citations·filing 1996–2020
95Inventor score
Top patents by PatentIndex Score
13 records- 0197US9124778B1Apparatuses and methods for disparity-based tracking and analysis of objects in a region of interestBRICKSTREAM CORP·Filed 2013·Granted Sep 1, 2015·111 cites·30 claims
- 0297US6263088B1System and method for tracking movement of objects in a sceneNCR CORP·Filed 1998·Granted Jul 17, 2001·459 cites·16 claims
- 0395US6295367B1System and method for tracking movement of objects in a scene using correspondence graphsEMTERA CORP·Filed 1998·Granted Sep 25, 2001·443 cites·38 claims
- 0492US7319479B1System and method for multi-camera linking and analysisBRICKSTREAM CORP·Filed 2001·Granted Jan 15, 2008·125 cites·18 claims
- 0592US6236736B1Method and apparatus for detecting movement patterns at a self-service checkout terminalNCR CORP·Filed 1998·Granted May 22, 2001·279 cites·21 claims
- 0692US6185314B1System and method for matching image information to object model informationNCR CORP·Filed 1998·Granted Feb 6, 2001·220 cites·12 claims
- 0790US6141433ASystem and method for segmenting image regions from a scene likely to represent particular objects in the sceneNCR CORP·Filed 1997·Granted Oct 31, 2000·140 cites·38 claims
- 0887US6061088ASystem and method for multi-resolution background adaptationNCR CORP·Filed 1998·Granted May 9, 2000·121 cites·37 claims
- 0987US5937084AKnowledge-based document analysis systemNCR CORP·Filed 1996·Granted Aug 10, 1999·231 cites·21 claims
- 1083US7702132B2Systems and methods for determining if objects are in a queueBRICKSTREAM CORP·Filed 2008·Granted Apr 20, 2010·15 cites·20 claims
- 1178US7400745B2Systems and methods for determining if objects are in a queueBRICKSTREAM CORP·Filed 2007·Granted Jul 15, 2008·11 cites·29 claims
- 1277US7171024B2Systems and methods for determining if objects are in a queueBRICKSTREAM CORP·Filed 2003·Granted Jan 30, 2007·29 cites·60 claims
- 1349US11631253B2People counting and tracking systems and methodsTeledyne FLIR LLC·Filed 2020·Granted Apr 18, 2023·0 cites·20 claims
Join the waitlist — get patent alerts
Get an alert when Ralph N. Crabtree files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →