Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
AC

Andrew K. Chang — 6 Patents

UNUnknown: 8 patents #1,262 of 83,584Top 2%
FMFmc: 3 patents #430 of 1,735Top 25%
ACAthena Controls: 1 patents #2 of 5Top 40%
Malibu, CA: #109 of 447 inventorsTop 25%
California: #94,478 of 386,348 inventorsTop 25%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Andrew K. Chang has been granted 6 US patents while listed as an inventor at Unknown. The first was granted in 1980 and the most recent in May 2002. Andrew K. Chang ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Andrew K. Chang in Malibu, CA, US.

Patents per Year

Patents granted per year, 1980 to 2002Bar chart with a peak of 2 patents in 1989.peak 21980: 1 patents19801981: 1 patents19811989: 2 patents19891994: 1 patents19942002: 1 patents2002

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6396032 Oven temperature control circuit Michael Denny, Mark L. Novack 2002-05-28
5314071 Glass sorter Donald J. Christian, Chin-Hu Feng, Jerry L. McComas 1994-05-24 $3,444,000
4841692 Shielded access apparatus for use in an enclosure for preventing propagation of electromagnetic energy into or out of the enclosure Donald N. Coupard, John E. Fuller, Angelo J. Mauriello 1989-06-27
4823523 Electromagnetic radiation shielding enclosure and shielding components Donald N. Coupard, John E. Fuller, Angelo J. Mauriello 1989-04-25
4249824 Apparatus for measuring wheel alignment of motor vehicles James L. Wiederrich, Julius J. Muray 1981-02-10 $1,935,000
4192074 On the fly run-out correction for vehicle alignment 1980-03-11 $2,390,000