Square, Inc.

Elliot John Patrick Sather

Jack Dorsey

Amish Rajesh Babu

James M McKelvey

Kartik Lamba

Adam David Peter Rothschild

Gregory Staples

A method of transmitting information to a mobile device includes providing a card reader is provided with a read head, a slot for swiping a magnetic stripe of a card and device electronics that includes an analog front-end and a microcontroller. The analog to digital front end is coupled to a processing element in the microcontroller. A raw magnetic head signal is received at the analog to digital front end. The raw magnetic head signal is converted into a processed digital signal that the microcontroller can interpret. An output jack output jack signal is delivered to the mobile device.

Card reader with passive ID circuit

A small card reader has a read head with a slot and positioned in a housing. The read head is configured to be coupled to a mobile device. The read head reads data on the magnetic stripe from a card that is slid in the slot and produces an output jack signal indicative of data stored on the magnetic stripe. An output jack is adapted to be inserted in a port of the mobile device and deliver the output jack signal to the mobile device. The read head positioned to accommodate rocking of a card while being swept in the slot while producing a successful read of the magnetic stripe of the card. The rocking is in an amount of 1 to 10 degrees of rotation of a bottom surface of the card away from a bottom surface of the slot.

Small card reader configured to be coupled to a mobile device

A card reader is positioned in a housing that has length, height and width dimensions. The read head is configured to be coupled to a mobile device and has a slot for swiping a magnetic stripe of a card. The read head reads data on the magnetic stripe and produces a signal indicative of data stored on the magnetic stripe. The read head has length, height and width edge surfaces. An asymmetric spring is coupled to the read head. The asymmetric spring positions the read head to be offset in the housing with the housing length and height edges being non-symmetrical in respect to the length and height edges of the read head. An output jack is adapted to be inserted in a port of the mobile device and deliver an output jack signal to the mobile device.

Card reader with asymmetric spring

Methods of transmitting information to mobile devices using cost effective card readers

Growing community of inventors

San Francisco, CA, United States of America

Elliot John Patrick Sather