US 11,718,336 B2
Navigation systems and methods for wheeled objects
Scott J. Carter, Seal Beach, CA (US); Stephen E. Hannah, Placentia, CA (US); and Jesse M. James, Ladera Ranch, CA (US)
Assigned to Gatekeeper Systems, Inc., Foothill Ranch, CA (US)
Filed by Gatekeeper Systems, Inc., Foothill Ranch, CA (US)
Filed on Jul. 21, 2020, as Appl. No. 16/934,815.
Application 14/299,957 is a division of application No. 13/209,219, filed on Aug. 12, 2011, granted, now 8,751,148, issued on Jun. 10, 2014.
Application 13/209,219 is a division of application No. 11/277,027, filed on Mar. 20, 2006, granted, now 8,046,160, issued on Oct. 25, 2011.
Application 16/934,815 is a continuation of application No. 15/468,581, filed on Mar. 24, 2017, granted, now 10,730,541.
Application 15/468,581 is a continuation of application No. 14/299,957, filed on Jun. 9, 2014, granted, now 9,630,639, issued on Apr. 25, 2017.
Claims priority of provisional application 60/663,327, filed on Mar. 18, 2005.
Claims priority of provisional application 60/663,195, filed on Mar. 18, 2005.
Claims priority of provisional application 60/663,147, filed on Mar. 18, 2005.
Prior Publication US 2020/0391780 A1, Dec. 17, 2020
Int. Cl. B62B 5/04 (2006.01); B62B 3/14 (2006.01); H04W 4/024 (2018.01); G08B 13/24 (2006.01); B60K 25/08 (2006.01); B60T 7/18 (2006.01); G01C 21/12 (2006.01); G06Q 10/08 (2023.01); G08G 1/00 (2006.01); H02K 7/18 (2006.01); H04W 4/029 (2018.01); A47F 10/04 (2006.01); B60T 7/16 (2006.01); G01C 21/20 (2006.01); B62B 5/00 (2006.01); G06K 7/10 (2006.01)
CPC B62B 5/0438 (2013.01) [A47F 10/04 (2013.01); B60K 25/08 (2013.01); B60T 7/16 (2013.01); B60T 7/18 (2013.01); B62B 3/14 (2013.01); B62B 3/1404 (2013.01); B62B 3/1412 (2013.01); B62B 3/1424 (2013.01); B62B 3/1492 (2013.01); B62B 5/0003 (2013.01); B62B 5/048 (2013.01); B62B 5/0423 (2013.01); G01C 21/12 (2013.01); G01C 21/206 (2013.01); G06K 7/10366 (2013.01); G06Q 10/08 (2013.01); G08B 13/2434 (2013.01); G08B 13/2448 (2013.01); G08B 13/2462 (2013.01); G08B 13/2482 (2013.01); G08G 1/20 (2013.01); H02K 7/1846 (2013.01); H04W 4/024 (2018.02); H04W 4/029 (2018.02); G08B 13/246 (2013.01); G08B 13/2474 (2013.01); G08B 13/2477 (2013.01); Y10T 29/49826 (2015.01)] 14 Claims
OG exemplary drawing
 
1. A system for monitoring a human-propelled cart, the system comprising:
a first magnetic sensor configured to record first magnetic data, the first magnetic sensor being part of a wheel assembly of the human-propelled cart;
a second magnetic sensor configured to record second magnetic data, the second magnetic sensor attached to the human-propelled cart and being separate from said wheel assembly; and
a processor configured to receive the first magnetic data and the second magnetic data, and to use the first and second magnetic data to determine at least a heading of the human-propelled cart;
wherein the first magnetic sensor is positioned at a first height and the second magnetic sensor is positioned at a second height that is different from the first height.