4. A - Human Necessities
  5. 01
  6. D

G. Haffner Donald

A - Human Necessities – 01 – D

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Gang lawn mower

A - Human Necessities – 01 – D
Patent

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Gang lawn mower with self-sharpening means

A - Human Necessities – 01 – B
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Hydrostatic transmission control for vehicles

B - Operations – Transporting – 60 – K
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Tractor-driven lawn mower

A - Human Necessities – 01 – D
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