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Ronald Quan — 121 Patents

MAMacrovision: 50 patents #1 of 69Top 2%

RTRovi Technologies: 25 patents #1 of 111Top 1%

HP: 4 patents #4,645 of 7,018Top 70%

Sony: 3 patents #10,793 of 25,231Top 45%

AMAmpex: 2 patents #74 of 247Top 30%

Stanford University: 1 patents #2,423 of 5,197Top 50%

Cupertino, CA: #65 of 6,989 inventorsTop 1%

California: #1,575 of 386,348 inventorsTop 1%

Overall (All Time): #9,811 of 4,157,543Top 1%

121 Patents All Time

Ronald Quan has been granted 121 US patents while listed as an inventor at Macrovision. The first was granted in 1981 and the most recent in November 2025. Ronald Quan ranks #9,811 of 4,157,543 US inventors in our database (top 0.24%). Patent records list Ronald Quan in Cupertino, CA, US.

Patents per Year

Issued Patents All Time

Showing 1–25 of 121 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12459809	Method and apparatus for evaluating electrostatic or nonlinear devices	Sandra Manosalvas-Kjono, Olav Solgaard, Zhuang Sun	2025-11-04
12107559	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2024-10-01
12035113	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2024-07-09
11425518	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2022-08-23
11418152	Biasing circuits for voltage controlled or output circuits	—	2022-08-16
11381211	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2022-07-05
11192779	Method and apparatus for evaluating electrostatic or nonlinear devices	Sandra Manosalvas-Kjono, Olav Solgaard, Zhanghao Sun	2021-12-07
11177786	Field effect transistor circuits	—	2021-11-16
11128262	Low voltage tube circuits	—	2021-09-21
11041893	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2021-06-22
10897681	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2021-01-19
10879864	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2020-12-29
10868507	Biasing circuits for voltage controlled or output circuits	—	2020-12-15
10651810	Field effect transistor circuits	—	2020-05-12
10536756	Method and apparatus for reducing and restoring the effectiveness of a commercial skip system	John O. Ryan, Peter Wonfor	2020-01-14	$4,949,000
10418960	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2019-09-17
10411009	Field effect transistor circuits	—	2019-09-10
10299041	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2019-05-21
10216205	Low voltage tube circuits	—	2019-02-26
10165379	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2018-12-25
10158957	Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effects	—	2018-12-18
10129605	Method and apparatus for reducing and restoring the effectiveness of a commercial skip system	John O. Ryan, Peter Wonfor	2018-11-13	$6,055,000
10067177	Method and apparatus to evaluate audio equipment via filter banks for dynamic distortions and or differential phase and frequency modulation effects	—	2018-09-04
10063194	Low voltage tube circuits	—	2018-08-28
10060958	Method and apparatus to evaluate audio equipment via at least one filter for dynamic distortions and or differential phase and or frequency modulation effects	—	2018-08-28