Marshall Drew and Co
From Graces Guide
of 140 Clarendon Road, London W11
1933 John Wilmott Marshall gained a patent on improvements in superchargers based on the Roots blower.
1935 Precision engineers[1]
1936 Fitted Marshall superchargers to MG sportcars[2] based on the Roots Blower scheme.
WWII Sir George Godfrey and Partners made/supplied Marshall superchargers for aviation use.
1941 The Marshall supercharger was the most widely used of the commercial Roots-type superchargers, according to Motorsport Magazine[3]
Post WWII War-surplus units were repurposed by L. M. Ballamy, Consulting and Experimental Engineers, later North Downs Engineering Co.
See Also
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