Khalid Karimullah — 19 Patents at Directv

Khalid Karimullah has been granted 19 US patents while listed as an inventor at Directv. The first was granted in 1994 and the most recent in October 2016. Khalid Karimullah ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list Khalid Karimullah in Olney, MD, US.

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
9467200	Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals	Feng-Wen Sun, Lin-Nan Lee	2016-10-11
8902840	Method and system for providing multi-input-multi-output (MIMO) downlink transmission	Jian Song	2014-12-02	$171,240,000
8243706	Method and system for providing multi-input-multi-output (MIMO) downlink transmission	Jian Song	2012-08-14	$48,345,000
8179781	Method and apparatus for encoding data for transmission in a communication system	Feng-Wen Sun, Lin-Nan Lee	2012-05-15	$140,990,000
7505440	Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals	Feng-Wen Sun, Lin-Nan Lee	2009-03-17	$156,051,000
7492749	Method and system for providing multi-input-multi-output (MIMO) downlink transmission	Jian Song	2009-02-17	$80,198,000
7483490	Method for transmitting wideband signals via a communication system adapted for narrow-band signal transmission	Lin-Nan Lee, Feng-Wen Sun, Kamran Etemad	2009-01-27	$32,214,000
7342904	Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals	Feng-Wen Sun, Lin-Nan Lee	2008-03-11	$57,728,000
7317710	Method and apparatus for encoding data for transmission in a communication system	Feng-Wen Sun, Lin-Nan Lee	2008-01-08	$73,638,000
6940809	System and method for transmitting data in frame format using an R-Rake retransmission technique with blind identification of data frames	Feng-Wen Sun, Lin-Nan Lee	2005-09-06	$19,591,000
6741581	System and method for transmitting data in frame format using an R-Rake retransmission technique with blind identification of data frames	Feng-Wen Sun, Lin-Nan Lee	2004-05-25	$28,563,000
6738366	SYSTEM AND METHOD FOR USING INHIBIT SENSE MULTIPLE ACCESS (ISMA) PROTOCOL AND A CAPTURE MESSAGE TO OPTIMIZE RANDOM ACCESS CONTROL AND DATA PACKET COMMUNICATION BETWEEN ACCESS TERMINALS AND A BASE STATION OVER A WIRELESS REVERSE COMMON CHANNEL	Kamran Etemad	2004-05-18	$72,593,000
6539050	Method for transmitting wideband signals via a communication system adapted for narrow-band signal transmission	Lin-Nan Lee, Feng-Wen Sun, Kamran Etemad	2003-03-25
6510147	Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals	Feng-Wen Sun, Lin-Nan Lee	2003-01-21
6396822	Method and apparatus for encoding data for transmission in a communication system	Feng-Wen Sun, Lin-Nan Lee	2002-05-28
6351240	Circularly polarized reflect array using 2-bit phase shifter having initial phase perturbation	Jian Song, Lin-Nan Lee, Stanley Kay	2002-02-26
6178334	Cellular/PCS network with distributed-RF base station	Dong-Jye Shyy, Cathy Zatloukal	2001-01-23
5423081	Cellular power amplifier power level control circuitry	Al Thiele, Sai Kwok	1995-06-06
5343493	Personal assistance system and method for use with a cellular communication system	—	1994-08-30

Khalid Karimullah — 19 Patents

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