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The patent us 2010/0073978 is clearly NOT an invention of a German company. To see how it had been used in volt meters in 1998, visit: http://www.chipinfo.ru/literature/radio/199801/p29.html

To have the material proof of the working bipolar transistor rectifier bridge exactly as shown on patent drawings, I can provide a power supply of my grandfather's radio, made in 1965. The synchronous rectifiers on germanium transistors were especially efficient at the time.

The us20100073978 is a common knowledge and not an invention of the 21st century.

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This application was rejected and ended up going abandoned in 2011 (you can look it up in Public PAIR at the USPTO). The primary reference used against it was US 3,434034 - A Universal AC or DC to DC converter - by Hewlett Packard (HP) in 1967.

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US20100073938 is just an application for patent, it is not granted as patent yet. See here http://www.google.com/patents/US20100073978

Under publication type you can see it is just application. For example, see this granted patent: https://www.google.com/patents/US5834678

You can see under publication it is grant

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