FreeSystems Pte Ltd
Records under this name other than patents FreeSystems Pte Ltd holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,680,202 | Digital wireless audio communication system employing time diversity Lapsed on the fee record Ended Mar 16, 2018 · From the USPTO record | Lapsed on the fee record | Ended Mar 16, 2018 | From the USPTO record |
| US 7,555,031 | Digital wireless audio receiver system employing time diversity Lapsed on the fee record Ended Jun 30, 2017 · From the USPTO record | Lapsed on the fee record | Ended Jun 30, 2017 | From the USPTO record |
| US 7,551,681 | Digital wireless audio transmitter system employing time diversity Lapsed on the fee record Ended Jun 23, 2017 · From the USPTO record | Lapsed on the fee record | Ended Jun 23, 2017 | From the USPTO record |
| US 6,741,659 | Wireless infrared digital audio transmitting system Lapsed on the fee record Ended May 25, 2016 · From the USPTO record | Lapsed on the fee record | Ended May 25, 2016 | From the USPTO record |
| US 6,728,585 | Personal on-demand audio entertainment device that is untethered and allows wireless download of content Lapsed on the fee record Ended Apr 27, 2016 · From the USPTO record | Lapsed on the fee record | Ended Apr 27, 2016 | From the USPTO record |
| US 6,671,325 | Wireless infrared digital audio system Lapsed on the fee record Ended Dec 30, 2015 · From the USPTO record | Lapsed on the fee record | Ended Dec 30, 2015 | From the USPTO record |
| US 6,668,204 | Biaural (2channel listening device that is equalized in-stu to compensate for differences between left and right earphone transducers and the ears themselves Lapsed on the fee record Ended Dec 23, 2015 · From the USPTO record | Lapsed on the fee record | Ended Dec 23, 2015 | From the USPTO record |
| US 7,289,560 | Digital modulation and demodulation technique for reliable wireless (both RF and IR) and wired high bandwidth data transmission Lapsed on the fee record Ended Oct 30, 2015 · From the USPTO record | Lapsed on the fee record | Ended Oct 30, 2015 | From the USPTO record |
| US 7,236,549 | Digital switching wireless receiver diversity and buffer diversity for enhanced reception in a wireless digital audio communication system Lapsed on the fee record Ended Jun 26, 2015 · From the USPTO record | Lapsed on the fee record | Ended Jun 26, 2015 | From the USPTO record |
| US 6,510,182 | Wireless infrared digital audio system Lapsed on the fee record Ended Jan 21, 2015 · From the USPTO record | Lapsed on the fee record | Ended Jan 21, 2015 | From the USPTO record |