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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Douglas Michael Marett — 4 Patents

UNUnknown: 1 patents #29,356 of 83,584Top 40%
Toronto, CA: #2,055 of 9,482 inventorsTop 25%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Douglas Michael Marett has been granted 4 US patents while listed as an inventor at Unknown. The first was granted in 1997 and the most recent in October 2008. Douglas Michael Marett ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Douglas Michael Marett in Toronto, ON, CA.

Patents per Year

Patents granted per year, 1997 to 2008Bar chart with a peak of 1 patents in 1997.peak 11997: 1 patents19971998: 1 patents19982003: 1 patents20032008: 1 patents2008

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
7438691 Method and device for predicting the fertile phase of women 2008-10-21
6592529 Method and device for predicting the fertile phase of women 2003-07-15
5813026 Portable electronic device for intermittently executing a program stored on transposable memory Charles J. Borg 1998-09-22
5685319 Method and apparatus for determining the fertility status of women 1997-11-11