Pre One:K. Ma, S. Mou and K. S. Yeo, “Harmonic Frequency Conversion Modulator, Demodulator and Mixer for Transceiver,” USA patent Number: 61/693,474, PCT/SG2013/000373

Next One:K. Ma, J. Gu, J.-G. Ma, Y. Lu; K. S. Yeo, “Linearization Techniques for Non-Class A Power Amplifier Using Active and Passive Devices,” US Patent Appln No: 61/406,588, USA patent Number: 13/881,573, Filed in 25, April, 2013 Also applied as TaiWan patent