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Patent applications and USPTO patent grants for Chang; Chi-An.The latest application filed is for "radio frequency amplifier system and heat dissipation device thereof".
Patent | Date |
---|---|
Radio frequency amplifier system and heat dissipation device thereof Grant 10,110,172 - Lin , et al. October 23, 2 | 2018-10-23 |
Radio Frequency Amplifier System And Heat Dissipation Device Thereof App 20170250659 - LIN; Ke-Cheng ;   et al. | 2017-08-31 |
Air cushion bed with massaging device Grant 6,695,798 - Chang February 24, 2 | 2004-02-24 |
Air cushion bed with flushing device App 20020124314 - Chang, Chi-An | 2002-09-12 |
Air cushion bed with massaging device App 20020128572 - Chang, Chi - An | 2002-09-12 |
Air cushion bed with water-draining device App 20020125179 - Chang, Chi-An | 2002-09-12 |
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