Assignee
FREESYSTEMS PTE LTD
SG·12 granted patents·6 pending applications·250 citations·filing 1999–2008
Top patents by PatentIndex Score
18 records- 0188US6728585B2Personal on-demand audio entertainment device that is untethered and allows wireless download of contentFREESYSTEMS PTE LTD·Filed 2001·Granted Apr 27, 2004·64 cites·33 claims
- 0287US6671325B2Wireless infrared digital audio systemFREESYSTEMS PTE LTD·Filed 2002·Granted Dec 30, 2003·27 cites·46 claims
- 0381US7555031B2Digital wireless audio receiver system employing time diversityFREESYSTEMS PTE LTD·Filed 2005·Granted Jun 30, 2009·11 cites·17 claims
- 0473US7551681B2Digital wireless audio transmitter system employing time diversityFREESYSTEMS PTE LTD·Filed 2005·Granted Jun 23, 2009·6 cites·19 claims
- 0572US6668204B2Biaural (2channel listening device that is equalized in-stu to compensate for differences between left and right earphone transducers and the ears themselvesFREESYSTEMS PTE LTD·Filed 2001·Granted Dec 23, 2003·19 cites·30 claims
- 0671US7680202B2Digital wireless audio communication system employing time diversityFREESYSTEMS PTE LTD·Filed 2005·Granted Mar 16, 2010·5 cites·32 claims
- 0762US7236549B2Digital switching wireless receiver diversity and buffer diversity for enhanced reception in a wireless digital audio communication systemFREESYSTEMS PTE LTD·Filed 2003·Granted Jun 26, 2007·9 cites·54 claims
- 0861US6510182B1Wireless infrared digital audio systemFREESYSTEMS PTE LTD·Filed 1999·Granted Jan 21, 2003·50 cites·23 claims
- 0959US6614024B1Infra-red wireless receiver with novel shielding and IR front end signal enhancementFREESYSTEMS PTE LTD·Filed 2000·Granted Sep 2, 2003·6 cites·26 claims
- 1051US2008175190A1Multi-node media content distribution systemFREESYSTEMS PTE LTD·Filed 2008·Application pending·0 cites
- 1151US2008175207A1Wireless network for personal computer human interface devicesFREESYSTEMS PTE LTD·Filed 2008·Application pending·0 cites
- 1246US6741659B1Wireless infrared digital audio transmitting systemFREESYSTEMS PTE LTD·Filed 1999·Granted May 25, 2004·23 cites·37 claims
- 1346US6614849B1Wireless infrared digital audio receiving systemFREESYSTEMS PTE LTD·Filed 1999·Granted Sep 2, 2003·24 cites·36 claims
- 1445US2008181148A1Multi-node media content relay systemFREESYSTEMS PTE LTD·Filed 2008·Application pending·0 cites
- 1544US7289560B2Digital modulation and demodulation technique for reliable wireless (both RF and IR) and wired high bandwidth data transmissionFREESYSTEMS PTE LTD·Filed 2003·Granted Oct 30, 2007·6 cites·23 claims
- 1640US2006062329A1Apparatus and method for adaptive digital locking and soft evaluation of data symbols in a wireless digital communication systemFREESYSTEMS PTE LTD·Filed 2005·Application pending·0 cites
- 1740US2006062338A1Method and apparatus for ensuring high quality audio playback in a wireless or wired digital audio communication systemFREESYSTEMS PTE LTD·Filed 2005·Application pending·0 cites
- 1833US2003130751A1New filter bank for graphics equalizer implementationFREESYSTEMS PTE LTD·Filed 2002·Application pending·0 cites
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