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USPTO Patent Rankings Data through Dec 31, 2025
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Ching Chu — 2 Patents

OHOhmeda: 1 patents #44 of 114Top 40%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Ching Chu has been granted 2 US patents while listed as an inventor at Ohmeda. The first was granted in 1998 and the most recent in May 1999. Ching Chu ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Ching Chu in Taipei, WI, TW.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5900552 Inwardly directed wave mode ultrasonic transducer, gas analyzer, and method of use and manufacture Neil D. Roiland 1999-05-04
5839302 Locking device with two simultaneously actuated cylindrical plugs 1998-11-24