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Gatekeeper Systems Inc patents


Recent patent applications related to Gatekeeper Systems Inc. Gatekeeper Systems Inc is listed as an Agent/Assignee. Note: Gatekeeper Systems Inc may have other listings under different names/spellings. We're not affiliated with Gatekeeper Systems Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "G" | Gatekeeper Systems Inc-related inventors


 new patent  Cart monitoring system with wheel assembly capable of visually signaling cart status

A system for monitoring shopping carts or other human-propelled carts includes wireless access points that communicate on a wireless network with wheel assemblies of the carts. The system is capable of monitoring a path followed by a cart in a store or building, and using the path (optionally together with other criteria) to determine whether to authorize the cart to exit. ... Gatekeeper Systems Inc

Direction crossing detector for containment boundary

A containment area can be defined by a single cable carrying an asymmetric electromagnetic signal that generates a magnetic field comprising an asymmetric waveform. A single inductor circuit configured to detect a single axis of the magnetic field can detect the asymmetric waveform and determine which direction the inductor is traveling relative to the cable. ... Gatekeeper Systems Inc

Navigation systems and methods for wheeled objects

A navigation system uses a dead reckoning method to estimate an object's present position relative to one or more prior positions. In some embodiments, the dead reckoning method determines a change in position from the object's heading and speed during an elapsed time interval. ... Gatekeeper Systems Inc

Low-energy consumption location of movable objects

Low-energy consumption techniques for locating a movable object using a global satellite navigation system (gnss) are provided. A mobile station attached to or included in a movable object can communicate bidirectionally with a fixed base station to determine a location of the movable object. ... Gatekeeper Systems Inc

Power generation systems and methods for wheeled objects

A power generation system for wheeled objects comprises a generator mechanically coupled to one or more of the object's wheels to convert wheel rotational energy into electrical energy. The power generation system may comprise an electrical storage device configured to store the electrical power produced by the generator. ... Gatekeeper Systems Inc

Systems and methods for monitoring wheeled vehicles using radio frequency identification (rfid) devices

Various embodiments of a system for tracking and/or controlling wheeled vehicles (such as shopping carts), are described. In some embodiments, the system includes an rfid tag on the cart and an rfid reader device external to the cart. ... Gatekeeper Systems Inc

Systems with buried antennas for bi-directional communication with wheeled vehicles

Various systems for monitoring wheeled vehicles (such as shopping carts) are disclosed. The system can include an rf antenna unit that is buried and is configured for bi-directional communication with the electronics on the cart. ... Gatekeeper Systems Inc

Monitoring usage or status of cart retrievers

Examples of systems and methods for controlling or monitoring a fleet of human-propelled, wheeled carts and cart retrievers are described. The carts can be shopping carts at a retail facility, and the cart retrievers can be used to collect and return the shopping carts from a parking lot near the facility to a cart collection area. ... Gatekeeper Systems Inc

Magnetometer and accelerometer calibration for cart navigation system

A wheeled object (e.g., a human-propelled cart such as a shopping cart) can include a navigation system that uses dead reckoning to determine the position of the wheeled object. The navigation system can include a magnetometer and an accelerometer and may be disposed on a handle of the wheeled object. ... Gatekeeper Systems Inc

Estimating motion of wheeled carts

Examples of systems and methods for locating movable objects such as carts (e.g., shopping carts) are disclosed. Such systems and methods can use dead reckoning techniques to estimate the current position of the movable object. ... Gatekeeper Systems Inc

Wheels for non-motorized vehicles

A wheel for a non-motorized vehicle (e.g., a shopping cart) can include a housing assembly and a tread assembly. The housing assembly can be configured to sealingly house electronics or other components. ... Gatekeeper Systems Inc








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