Grain drill depth adjustment tool

Details Grain drill depth adjustment tool Grain drill depth adjustment tool

2006-05-23

2006-05-23

Watson, Gary D. (Department: 2915)

Machines not elsewhere specified

Agricultural or construction machinery

Element or attachment

Design Patent

active

D0521531

CLAIM:
The ornamental design for a grain drill depth adjustment tool, as shown and described.

REFERENCES:
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patent: 4580507 (1986-04-01), Dreyer et al.
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patent: D302558 (1989-08-01), Davis et al.
patent: D306685 (1990-03-01), Nadeau
patent: 5145018 (1992-09-01), Schimke et al.
patent: D397594 (1998-09-01), Harper
patent: D397596 (1998-09-01), Morin
patent: 5983813 (1999-11-01), Swab et al.
patent: D424385 (2000-05-01), Tisbo et al.
patent: D440476 (2001-04-01), Del Gaone
patent: D487099 (2004-02-01), Bruns et al.

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