John A. Hoffnagle — 18 Patents at IBM

John A. Hoffnagle has been granted 18 US patents while listed as an inventor at IBM. The first was granted in 1993 and the most recent in April 2025. John A. Hoffnagle ranks #245,716 of 4,157,543 US inventors in our database (top 5.9%). Patent records list John A. Hoffnagle in San Jose, CA, US.

Patents per Year

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Showing 1–18 of 18 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12270706	Cavity enhanced absorption spectroscopy using a piecewise tunable laser and hierarchical wavelength determination	Alejandro Dario Farinas, Chris W. Rella, Sze Meng Tan	2025-04-08
11592388	Clutter avoidance in wide-band cavity ring-down data acquisition	Chris W. Rella	2023-02-28
11092493	Cavity enhanced absorption spectroscopy using a piecewise tunable laser and hierarchical wavelength determination	Alejandro Dario Farinas, Chris W. Rella, Sze Meng Tan	2021-08-17
11035728	Cavity ring-down spectroscopy having interleaved data acquisition for interference mitigation	Chris W. Rella, Hongbing Chen, Derek Gregory Fleck, James I. C. Lee, Gerald Thomas Sorensen +1 more	2021-06-15
9645077	Spectroscopic quantification of extremely rare molecular species in the presence of interfering optical absorption	Ted Ognibene, Graham Bench, Alan Daniel McCartt, Kenneth W. Turteltaub, Chris W. Rella +3 more	2017-05-09
9267880	Ring-down binning in FSR hopping mode	Sze Meng Tan, Chris W. Rella	2016-02-23
8982352	Regular, stable optical frequency scale for cavity enhanced optical spectroscopy	Sze Meng Tan, Chris W. Rella	2015-03-17
7875408	Bleachable materials for lithography	David R. Medeiros, Robert D. Miller, Libor Vycklicky, Gregory Michael Wallraff	2011-01-25	$4,442,000
7179571	Apparatus for characterization of photoresist resolution, and method of use	William D. Hinsberg, Frances Anne Houle, Martha I. Sanchez	2007-02-20	$6,976,000
7079223	Fast model-based optical proximity correction	Alan E. Rosenbluth, Gregg M. Gallatin, Ronald Gordon, Nakgeuon Seong, Alexey Y. Lvov +3 more	2006-07-18	$4,124,000
7046342	Apparatus for characterization of photoresist resolution, and method of use	William D. Hinsberg, Frances Anne Houle, Martha I. Sanchez	2006-05-16	$5,914,000
6879448	Apparatus for achromatizing optical beams	Carl M. Jefferson	2005-04-12	$5,340,000
6801368	System for converting optical beams to collimated flat-top beams	Hans J. Coufal, Carl M. Jefferson	2004-10-05	$8,713,000
6654183	System for converting optical beams to collimated flat-top beams	Hans J. Coufal, Carl M. Jefferson	2003-11-25	$5,480,000
6295168	Refractive optical system that converts a laser beam to a collimated flat-top beam	Carl M. Jefferson	2001-09-25	$32,998,000
6178000	Monolithic symmetric interferometer for generation of variable-periodicity patterns for lithography	—	2001-01-23	$22,404,000
5379000	Atomic clock employing ion trap of mono- or multi-planar geometry	Richard Grant Brewer, Ralph G. Devoe, Kenneth L. Foster, Reinald Kallenbach	1995-01-03	$8,869,000
5248883	Ion traps of mono- or multi-planar geometry and planar ion trap devices	Richard Grant Brewer, Ralph G. Devoe, Kenneth L. Foster, Reinald Kallenbach	1993-09-28	$10,590,000

John A. Hoffnagle — 18 Patents

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