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UPDATE - May, 2019 - 1967 Patent
In May, 2019, collector and historian maxwestern identified the
Actual Inventor of the Sunbeam Lawnkeeper chassis ...

Filed in May, 1967 the inventor was James Edward White.
This fits in nicely with this Historical Record: The Sunbeam Lawnkeeper
was introduced in late 1967 for the 1968 range year.

Many thanks to Max for unearthing this document!

Attachments
1967 21090_Page_01.jpg (136.5 KB, 92 downloads)
1967 21090_Page_02.jpg (170.99 KB, 89 downloads)
1967 21090_Page_03.jpg (73.96 KB, 88 downloads)
1967 21090_Page_04.jpg (171.51 KB, 89 downloads)
1967 21090_Page_05.jpg (207.36 KB, 88 downloads)
1967 21090_Page_06.jpg (165.61 KB, 88 downloads)
1967 21090_Page_07.jpg (83.97 KB, 90 downloads)
1967 21090_Page_08.jpg (164.97 KB, 89 downloads)
1967 21090_Page_09.jpg (130.95 KB, 89 downloads)
1967 21090_Page_10.jpg (29.58 KB, 88 downloads)
1967 21090_Page_11.jpg (99.49 KB, 89 downloads)
1967 21090_Page_12.jpg (39.17 KB, 89 downloads)