Hi Ty, grumpy and ODK members,

Goodall was tinkering way before he patented anything.
I think 1939 is the key date for domestic petrol rotaries in the USA.

I like Grumpy's point on the 'inventor-entrepreneur'.
I firmly believe Richardson was of this type.
Others I have found are Australia's Arthur Bishop and his L.B.L. mower;
and NZ's Charles Crowe and his mowers (no relation to the AUS Crowe mowers).

All very interesting.
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JACK