Inventor
HENDERSON RICHARD D
US18 patents
⚠️ This page may combine multiple inventors who share the name “HENDERSON RICHARD D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
EBAY INC
7 patentsUS7870127B2Jan 11, 2011
Automated method and system to calculate the surface distance between two geographical locations, and to filter a data set based on the calculation
EBAY INC9 citations84
US9607049B2Mar 28, 2017
Systems and methods to build and utilize a search infrastructure
EBAY INC5 citations79
US12204572B2Jan 21, 2025
Item matching
EBAY INC2 citations73
US11636142B2Apr 25, 2023
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EBAY INC1 citations72
US11003698B2May 11, 2021
Item matching
EBAY INC2 citations72
US7395257B2Jul 1, 2008
Automated method and system to calculate the surface distance between two geographical locations, and to filter a data set based on the calculation
EBAY INC5 citations62
US10482113B2Nov 19, 2019
Systems and methods to build and utilize a search infrastructure
EBAY INC0 citations47
NAT SEMICONDUCTOR CORP
4 patentsUS4887240ADec 12, 1989
Staggered refresh for dram array
NAT SEMICONDUCTOR CORP91 citations93
US6778938B1Aug 17, 2004
Fan speed detection in the presence of PWM speed control
NAT SEMICONDUCTOR CORP45 citations92
US5022056AJun 4, 1991
Method and structure for digital phase synchronization
NAT SEMICONDUCTOR CORP73 citations91
US5138189AAug 11, 1992
Asynchronous state machine synchronization circuit and method
NAT SEMICONDUCTOR CORP16 citations68