Fred L. Heismann — 24 Patents at AT&T

Fred L. Heismann has been granted 24 US patents while listed as an inventor at AT&T. The first was granted in 1990 and the most recent in May 2020. Fred L. Heismann ranks #168,038 of 4,157,543 US inventors in our database (top 4.0%). Patent records list Fred L. Heismann in Colts Neck Township, NJ, US.

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Showing 1–24 of 24 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
10651931	Determining in-band optical signal-to-noise ratio in polarization-multiplexed optical signals using signal correlations	—	2020-05-12	$7,824,000
10218436	Determining in-band optical signal-to-noise ratio in polarization-multiplexed optical signals using signal correlations	—	2019-02-26	$6,371,000
9825698	Determining in-band optical signal-to-noise ratio in polarization-multiplexed optical signals using signal correlations	—	2017-11-21	$4,529,000
8294896	Determining in-band optical signal-to-noise ratios in optical signals with time-varying polarization states using polarization extinction	—	2012-10-23
8135275	Measuring chromatic dispersion in an optical wavelength channel of an optical fiber link	Brandon C. Collings	2012-03-13
8131157	Method and apparatus for generating signals with increased dispersion tolerance using a directly modulated laser transmitter	Daniel Mahgerefteh, Parviz Tayebati	2012-03-06	$7,079,000
6411750	Distortion analyzer	Daniel Fishman, David L. Wilson	2002-06-25	$6,644,000
6330375	Distortion analyzer for compensation apparatus of first order polarization mode dispersion (PMD)	Daniel Fishman, David L. Wilson	2001-12-11	$27,833,000
5970201	Power regulation in optical networks	Philip J. Anthony, Edmond J. Murphy, Timothy O. Murphy	1999-10-19	$58,642,000
5930414	Method and apparatus for automatic compensation of first-order polarization mode dispersion (PMD)	Daniel Fishman, David L. Wilson	1999-07-27	$52,855,000
5892606	Maintenance of optical networks	Mohammad Taghi Fatehi	1999-04-06	$98,445,000
5801863	Maintenance of optical networks	Mohammad Taghi Fatehi	1998-09-01	$28,227,000
5745274	Maintenance of optical networks	Mohammad Taghi Fatehi	1998-04-28	$18,441,000
5611005	High-speed polarization scrambler with adjustable chirp	Robert W. Smith	1997-03-11	$27,988,000
5600738	Polarization dispersion compensation for optical devices	Glenn D. Bergland, Steven K. Korotky, Edmond J. Murphy	1997-02-04	$16,107,000
5495543	Polarization-independent optical wavelength selective coupler	Rodney C. Alferness	1996-02-27
5388170	Electrooptic device structure and method for reducing thermal effects in optical waveguide modulators	Steven K. Korotky, John J. Veselka, Jr.	1995-02-07
5361270	Apparatus and method employing polarization modulation to reduce effects of polarization hole burning and/or polarization dependent loss	—	1994-11-01
5359678	Apparatus and method employing fast polarization modulation to reduce effects of polarization hole burning and/or polarization dependent loss	Robert Rosenberg	1994-10-25
5327511	Apparatus and method employing fast polarization modulation to reduce effects of polarization hole burning and polarization dependent loss	Robert Rosenberg	1994-07-05
5317439	Automatic on-line monitoring and optimization of optical network switching nodes	Mohammad Taghi Fatehi	1994-05-31
5296956	Performance monitoring and fault location for optical equipment, systems and networks	Mohammad Taghi Fatehi	1994-03-22
5212743	Automatic polarization controller having broadband, reset-free operation	—	1993-05-18
4966431	Integrated-optic endless polarization transformer	—	1990-10-30

Fred L. Heismann — 24 Patents

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