Inventor

John H Holt

Patents indexed

Year range

1915

Associated with

Years active

1915

Total patents

Most recent

1915

Domains

automotivemechanical

Activity by decade

1910s

Patents

Career timeline

1 patents, in 1915

Dot size = forward citations

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Early Car Wheel Traction Device

A 1915 patent for a metal device clamped to a car wheel to improve traction on slippery surfaces.

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