1
Howard D Martin: Ground-driven rotary row cleaner. Deere & Company, Ritts Brickfield & Kaufman, November 22, 1988: US04785890 (91 worldwide citation)

The specification discloses an improved row cleaning apparatus to selectively clean away mulch from conservation tilled fields without cultivation of the soil. When mounted on a tractor-drawn planter unit, the cleaning action of the present invention improves depth control and planting speed of the ...


2
Howard D Martin: Method for planter depth monitoring. Howard D Martin, Law Office of Jay R Hamilton, April 22, 2008: US07360495 (63 worldwide citation)

An improved method of monitoring penetration of a planting unit into a ground surface comprising engaging a planting unit with a ground surface wherein the planting unit has a planting unit frame and the planting unit frame is cooperatively engaged with a support member by a planting frame and where ...


3
Howard D Martin: Apparatus for planter depth monitoring. Howard D Martin, Law Office of Jay R Hamilton, April 22, 2008: US07360494 (52 worldwide citation)

A seed planting assembly comprising a laterally extending support member and a planting unit including a planting frame supported by said support member. Said planting unit frame carries, a seed trench opening assembly operable to create a seed trench in a ground surface, a depth regulating member h ...


4
Howard D Martin, Ronald S Martin: Single arm row cleaner. Hamilton IP Law P C, Jay R Hamilton, Charles A Damschen, May 24, 2011: US07946231 (42 worldwide citation)

A single arm row cleaner unit mountable to a grain drill opener arm includes a row cleaner arm and a mounting saddle. The mounting saddle is generally configured for attachment to a main arm of a furrow forming assembly. A row cleaner arm may be pivotally attached to the mounting saddle about a mand ...


5
Howard D Martin: Multi diameter gauge wheel. Hamilton IP Law PC, Jay R Hamilton, Charles A Damschen, December 6, 2011: US08069798 (13 worldwide citation)

An improved depth regulating member comprising: a first portion, the first portion positioned adjacent a furrow forming assembly for engagement with ground surface adjacent a furrow; and a second portion, the second portion positioned adjacent the first portion opposite the surface of the first port ...


6
Howard D Martin: Single disc liquid fertilizer opener. Hamilton IP Law PC, Jay R Hamilton, Charles A Damschen, January 27, 2009: US07481171 (9 worldwide citation)

A method and apparatus to be mounted upon a planter row unit for delivering liquid fertilizer to the bottom of a trench without contacting the seed to be planted is disclosed and claimed. The system as claimed and described is adapted for mounting to substantially all modern row units employing floa ...


7
Howard D Martin: Paired single disc opener unit. Hamilton IP Law PC, Jay R Hamilton, Charles A Damschen, March 2, 2010: US07669536 (5 worldwide citation)

An opener unit having a pair of single disc openers mounted upon a parallel linkage which may be mounted onto a tool bar or drawbar is disclosed and claimed. The pair of single opener discs may be used for controlled creation of a pair of furrows to which seed, fertilizer or other soil amendments ma ...


8
Howard D Martin: Paired single disc opener unit. Hamilton IP Law PC, Jay R Hamilton, Charles A Damschen, January 12, 2010: US07644670 (4 worldwide citation)

An opener unit having a pair of single disc openers mounted upon a parallel linkage which may be mounted onto a tool bar or drawbar is disclosed and claimed. The pair of single opener discs may be used for controlled creation of a pair of furrows to which seed, fertilizer or other soil amendments ma ...


9
Howard D Martin: Single disc liquid fertilizer opener. Hamilton IP Law PC, Jay R Hamilton, Charles A Damschen, July 28, 2009: US07565870 (3 worldwide citation)

A method and apparatus to be mounted upon a planter row unit for delivering liquid fertilizer to the bottom of a trench without contacting the seed to be planted is disclosed and claimed. The system as claimed and described is adapted for mounting to substantially all modern row units employing floa ...


10
Howard D Martin: Paired single disc opener unit. Hamilton IP Law PC, Jay R Hamilton, Charles A Damschen, August 13, 2013: US08505473 (2 worldwide citation)

An opener unit having a pair of single disc openers mounted upon a parallel linkage which may be mounted onto a tool bar or drawbar is disclosed and claimed. The pair of single opener discs may be used for controlled creation of a pair of furrows to which seed, fertilizer or other soil amendments ma ...