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USPTO Patent Rankings Data through Dec 31, 2025
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Michael L. Dorrough — 6 Patents

UNUnknown: 1 patents #29,356 of 83,584Top 40%
Calabasas, CA: #636 of 4,119 inventorsTop 20%
California: #94,478 of 386,348 inventorsTop 25%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Michael L. Dorrough has been granted 6 US patents while listed as an inventor at Unknown. The first was granted in 1985 and the most recent in March 2006. Michael L. Dorrough ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Michael L. Dorrough in Calabasas, CA, US.

Patents per Year

Patents granted per year, 1985 to 2006Bar chart with a peak of 1 patents in 1985.peak 11985: 1 patents19851993: 1 patents19931994: 1 patents19941998: 1 patents19982001: 1 patents20012006: 1 patents2006

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
7016659 Amplitude modulation with time- and spectrum-shared sidebands Dennis Robert Lee, Alfred Edward Parker, Richard Williamson Burden 2006-03-21
6198403 Power line meter/monitor with LED display Michael J. Cane 2001-03-06
5751819 Level meter for digitally-encoded audio 1998-05-12
5343534 Sequential audio switcher Robert R. Conger 1994-08-30
5216492 Dynamic video luminance and chrominance meter Kenneth S. Gold, H. Maurice France 1993-06-01
4528501 Dual loudness meter and method Kenneth S. Gold 1985-07-09