Method and apparatus to combine radio frequency signals

Details Method and apparatus to combine radio frequency signals Method and apparatus to combine radio frequency signals

2007-03-27

2007-03-27

Vuong, Quochien B. (Department: 2684)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C342S382000

Reexamination Certificate

active

10608544

ABSTRACT:
The invention concerns 2-oxo-1-pyrrolidine derivatives and a process for preparing them and their uses. The invention also concerns a process for preparing α-ethyl-2-oxo-1-pyrrolidine acetamide derivatives from unsaturated 2-oxo-1-pyrrolidine derivatives. Particularly the invention concerns novel intermediates and their use in methods for the preparation of S-α-ethyl-2oxo-1-pyrrolidine acetamide.

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Ellinger, et al., “An Antenna Diversity MMIC Vector Modulator for HIPERLAN with Low Power Consumption and Calibration Capability”, IEEE Transactions on Microwave Theory and Techniques, vol. 49, No. 5, May 2001.
International Search Report for PCT/US2004/017427, mailed Oct. 28, 2004.

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