Sunpower, Inc.

US Patent 7409833 Dual mode compressor with automatic compression ratio adjustment for adapting to multiple operating conditions

US Patent 7434409 Pulse tube cooler having ¼ wavelength resonator tube instead of reservoir

US Patent 7437878 Multi-stage pulse tube cryocooler with acoustic impedance constructed to reduce transient cool down time and thermal loss

US Patent 7453241 Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator

US Patent 7458143 System for centering a workpiece on the central axis of a cylindrical bore

US Patent 7511459 Controller computing a virtual tuning capacitor for controlling a free-piston stirling engine driving a linear alternator

US Patent 7600464 Multi-piece piston for a free piston machine

US Patent 7633173 Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator

US Patent 7685818 Connection of a free-piston stirling machine and a load or prime mover permitting differing amplitudes of reciprocation

US Patent 7701075 Hybrid electrical power source combining stirling engine driven alternator with supplementing electrical energy storage

US Patent 7744133 Jointed head with temporary clamp for stirling machine

US Patent 7784184 Involute foil regenerator method