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John William Speakman

📍 Toronto, CA: #5,171 of 9,482 inventorsTop 55%
Overall (All Time): #3,731,618 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
D387393 Clapper board box David Jonathon Mikelberg, Daniel Wilchesky 1997-12-09