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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

Navigation 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. In embodiments suitable for use with... 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. The mobile station may communicate an... Gatekeeper Systems Inc

Power generation 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. Power from... 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. The tag can receive an interrogation signal from the reader and reply... 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. In some embodiments, the antenna comprises a plurality of transmitters, which can emit synchronized signals.... 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... 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. Various techniques for improving accuracy of position estimates are disclosed, including compensation for various error... 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

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. The tread assembly can removably mate with the housing assembly such that the electronics or other components remain... Gatekeeper Systems Inc

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This listing is an abstract for educational and research purposes is only meant as a recent sample of applications filed, not a comprehensive history. is not affiliated or associated with Gatekeeper Systems Inc in any way and there may be associated servicemarks. This data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Gatekeeper Systems Inc with additional patents listed. Browse our Agent directory for other possible listings. Page by