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Tim Wang — 2 Patents in 1989

Overall (1989): #14,205 of 140,708Top 15%
2 Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
D304230 Ceramic heating element 1989-10-24
4855570 Electric fluid heating unit having radial PTC ceramic heating elements 1989-08-08