Chang & Hale LLP

4 registered patent practitioners: 4 patent attorneys and 0 patent agents, Irvine, CA.

• David S. Barnhill — Patent attorney, Reg. No. 72376, Chang & Hale LLP
• James W. Chang — Patent attorney, Reg. No. 52718, Chang & Hale LLP
• Alan T. Hale — Patent attorney, Reg. No. 68226, Chang & Hale LLP
• Yi Zhang — Patent attorney, Reg. No. 74150, Chang & Hale LLP