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USPTO Patent Rankings Data through Dec 31, 2025
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Daniel E. Douro — 2 Patents

SLSpirax-Sarco Limited: 2 patents #16 of 50Top 35%
Allentown, PA: #552 of 1,150 inventorsTop 50%
Pennsylvania: #30,766 of 74,527 inventorsTop 45%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Daniel E. Douro has been granted 2 US patents while listed as an inventor at Spirax-Sarco Limited. The first was granted in 1993 and the most recent in August 1999. Daniel E. Douro ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Daniel E. Douro in Allentown, PA, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5938409 Gas powered fluid pump with exhaust assist valve Bernard J. Radle, Jr. 1999-08-17
5230361 Snap action toggle valve actuator assembly Thomas W. Carr 1993-07-27