Calamp Corp.

E.f. Johnson Company

Christopher J Ludewig

Lloyd Wendland

Somu Ramiah

David Best

Pierre Olivier

Andrew Morrow

Systems and methods for multiple network mode selection devices in accordance with embodiments of the invention are disclosed. In one embodiment of the invention, a multiple network mode selection device includes a processor, a radio module connected to the processor, and network determination process storage connected to the processor and configured to store one or more network determination processes, wherein the processor is configured to connect to a first network using the radio module, execute a network determination process selected from the one or more network determination process, reprogram the radio module in response to the executed network determination process, and connect to a second network using the radio module, where the second network is separate from the first network.

Multiple network mode selection devices

A battery charger designed for use with a portable battery powered device. The battery charger has a housing and two battery charger ports defined therein, each of the battery charger ports have a first open end at the surface of the housing and a second closed end. The battery charger ports include at least two sets of spaced apart battery engaging electrodes disposed therein. The second closed end of the first charging port has a stepped configuration that defines a first step adapted to receive and hold a first selected battery in electrical contact with a first set of electrodes and a second step adapted to receive and hold a second selected battery in electrical contact with a second set of electrodes. The second closed end of the second charging port has a stepped configuration that defines a first step adapted to receive and hold a first selected battery having a battery powered device mated thereto in electrical contact with a first set of electrodes and a second step adapted to receive and hold a second selected battery having the battery powered device mated thereto in electrical contact with a second set of electrodes.

Battery charger

A portable radiotelephone includes a chassis and antenna connector with an impedance of less than 200 ohms, the antenna connector supporting an extendable antenna that is movable back and forth between extended and retracted positions relative to the chassis. The antenna connector also can support a fixed antenna or a connection to external equipment. A universal radiotelephone housing includes a single external connector port for selectively providing electrical connection to both an extendable antenna and external test equipment, precluding the need for separate test and extendable antenna ports. The single external connector port includes an aperture allowing the extendable antenna to pass therethrough.

Growing community of inventors

Northfield, MN, United States of America

Christopher J Ludewig