Leapfrog Enterprises, Inc.

Paul Rymarz

William Greger

Paul Andrew Gojenola

McKenzie Robert Keith

Alean Daniel

Lawrence Carlson Tan

Jorge Gabriel Soto

Rachel Bautista

Joe MacCarthy

A rechargeable battery pack can provide power to a device that also accepts at least one standard non-rechargeable battery. The rechargeable battery pack may include a housing for housing at least one battery cell and recharging circuitry. The at least one battery cell and the recharging circuitry can be housed substantially within the housing. The recharging circuitry can be coupled with the at least one battery cell. The recharging circuitry can be configured to charge the at least one battery cell when the battery pack is inserted into the device that also accepts at least one non-rechargeable battery. The rechargeable battery pack may further include a protection circuit coupled with the recharging circuitry.

Rechargeable battery

One embodiment of the invention is directed to a rechargeable battery pack configured to provide power to a device that also accepts at least one standard non-rechargeable battery. The rechargeable battery pack comprises a housing for housing at least one battery cell and recharging circuitry. The at least one battery cell and the recharging circuitry is be housed substantially within the housing. The recharging circuitry is coupled with the at least one battery cell. The recharging circuitry is configured to charge the at least one battery cell when the battery pack is inserted into the device that also accepts at least one non-rechargeable battery. The rechargeable battery back further comprises a protection circuit coupled with the recharging circuitry.

An apparatus for detecting writing pressure is comprised of a carrier. A mode selection device coupled to the carrier is operable to select writing modes. A switch coupled to the carrier is operable to move between a first state and a second state in response to writing pressure coupled to the switch. An actuator coupled to the carrier is configured to actuate the switch in response to pressure applied to the actuator in response to writing.

Switch configuration for detecting writing pressure in a writing device

A user interface device for controlling an audio visual system. In one embodiment, a device for interfacing with an audio/visual system includes a sensor mat including a surface and operable to be disposed on a substantially flat floor. The sensor mat is further operable for generating electrical signals responsive to physical interactions of a user with the surface. The interface device also includes an electronic control unit including circuitry for coupling to the mat, the electronic control unit for detecting the physical interactions of the mat and the electronic control unit operable to be placed on the substantially flat floor. The interface device further includes an elongated shaft having a first end and a second end and physically coupled to the electronic control unit via the first end and extending laterally therefrom. The second end of the elongated shaft is operable to be displaced in various directions by interactions with both hands of the user. The electronic control unit is operable to detect the various directions wherein further the electronic control unit is operable to transmit signals representing the various directions and the physical interactions to a receiver unit.

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Alameda, CA, United States of America

Paul Rymarz