Ground aerator

Tools and hardware – Tools and implements for agriculture – forestry and horticulture – Provided with cutting blade and tines

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D03092429

REFERENCES:
patent: D221727 (1971-09-01), Erickson
patent: D290809 (1987-07-01), Elliott
patent: D301535 (1989-06-01), Cain
patent: 1635308 (1927-07-01), Botsford
patent: 1888170 (1932-11-01), Hornbaker
patent: 2720023 (1955-10-01), Koscher et al.
patent: 3199817 (1965-08-01), Fox
patent: 3290821 (1966-12-01), Parry
Green River Tools Catalogue (1985) p. 11, "The Bio-Fork".
Washburn Hardware Catalogue (1941) p. 36, "Sectional Ornamental Fence".
True-Temper advertisement (1965) "Lawn Aerator #A2P".

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