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Post Hole Digger.

Description: Patent for a new and improved post-hole digger. This design "has for its object to provide a simple, durable, inexpensive, and efficient device, the levers of which can be readily separated, so that either of them can be used as a spade or shovel to fill in the earth around the post after it is placed in the hole" (lines 14-19).
Date: November 21, 1882
Creator: Armstrong, John J.
Partner: UNT Libraries Government Documents Department

Corn and Cotton Planter.

Description: Patent for a new and improved planter. This design, when used "as a corn-planter the slotted plate upon the inclined portion of the bottom is adjusted to cover the entire slot, and the pitman is attached to the pin projecting from the bar operating the seed slide, and when the machine is to be used as a cotton-planter the pitman is attached to the crank at the side of the seed-box, and the plate in the bottom of the box is adjusted so as to give the slot sufficient width to allow the cotton-seed to be forced through it" (lines 84-94).
Date: December 28, 1886
Creator: Armstrong, John J. & Lowrey, Andrew S.
Partner: UNT Libraries Government Documents Department

Corn or Cotton Planter.

Description: Patent for a new and improved planter. This design consists in "the combination, with the hopper and the seed-slide therein having one end projecting from one end of the hopper, of the reciprocating yoke having its rear portion angular in cross-section and its front portion cylindrical in cross-section and having an arm at one end to engage the opening in the projecting end of the seed-slide, the angular and cylindrical bearings for the respective parts of the yoke, whereby the latter may be unshipped from or attached to the seed-slide, and the mechanism to reciprocate the yoke" (lines 71-83).
Date: April 23, 1889
Creator: Armstrong, John Joshua & Lowrey, Andrew Stephen
Partner: UNT Libraries Government Documents Department

Plow.

Description: Patent for improvements to the turning-plow, with convertible attachments for other forms of plow.
Date: December 11, 1900
Creator: Armstrong, John Joshua, Sr.
Partner: UNT Libraries Government Documents Department