Gregory Um has been granted 22 US patents while listed as an inventor at Aura Systems . The first was granted in 1990 and the most recent in July 2019. Gregory Um ranks #189,202 of 4,157,543 US inventors in our database (top 4.6%). Patent records list Gregory Um in Torrance, CA, US.
Patents per Year Patents granted per year, 1990 to 2019 Bar chart with a peak of 5 patents in 1992. peak 5 1990: 1 patents 1990 1991: 2 patents 1992: 5 patents 1992 1993: 3 patents 1996: 2 patents 1996 1997: 2 patents 1998: 1 patents 1998 2002: 1 patents 2003: 1 patents 2003 2004: 2 patents 2013: 1 patents 2013 2019: 1 patents 2019
Issued Patents All Time
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Showing 1–22 of 22 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
10365375 Method and apparatus for ionosphere depletion detection Yury N. Golubev 2019-07-30
$39,541,000
8344946 Single frequency user ionosphere system and technique Mark Wayne Biggs , Timothy R. Schempp 2013-01-01
6791522 Triodic rectifier switch Choong-Hoon Yi , Sun-Hee Yang , Chang-Su Seo , Song Yi Lee 2004-09-14
6694269 Capacitive circuit array for fingerprint sensing Robert S. Hayes 2004-02-17
6670649 Triodic rectifier switch Choong-Hoon Yi , Un-Chol Oh , Won-Pil Lee , Sun-Hee Yang 2003-12-30
6429666 Capacitive circuit array for fingerprint sensing — 2002-08-06
5710657 Monomorph thin film actuated mirror array — 1998-01-20
$4,501,000
5689380 Thin film actuated mirror array for providing double tilt angle — 1997-11-18
$5,850,000
5616982 Piezoelectric actuator Andrei Szilagyi 1997-04-01
$2,854,000
5589084 Thin film actuated mirror array Jeong-Beom Ji 1996-12-31
$2,976,000
5481396 Thin film actuated mirror array Jeong-Beom Ji 1996-01-02
$5,899,000
5260798 Pixel intensity modulator Andrei Szilagyi 1993-11-09
$4,500,000
5245369 Scene projector Yeon Hak Lee 1993-09-14
$3,006,000
5185660 Actuated mirror optical intensity modulation — 1993-02-09
$2,145,000
5175465 Piezoelectric and electrostrictive actuators Andrei Szilagyi 1992-12-29
$2,205,000
5159225 Piezoelectric actuator — 1992-10-27
$2,327,000
5150205 Actuated mirror optical intensity modulation Andrei Szilagyi 1992-09-22
$2,477,000
5126836 Actuated mirror optical intensity modulation — 1992-06-30
$2,019,000
5085497 Method for fabricating mirror array for optical projection system Andrei Szilagyi 1992-02-04
$4,645,000
5035475 Unique modulation television Yeon Hak Lee 1991-07-30
$3,790,000
5032906 Intensity calibration method for scene projector — 1991-07-16
$3,416,000
4979789 Continuous source scene projector — 1990-12-25
