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An automatic bed maker which uses the expansion of inflatable bladder to straighten, align, and tuck-in bed-cover assembly.
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| Number | Title | Issue Date |
| 7325623 | Rolling spike harrow The spike wheels of the harrow are arranged in gangs to rotate about a common axis during ground engagement. Each wheel has a plurality of spikes that project outwardly from a cylindrical hub having a pair of opposite ends. Projections at one end of the hub are mati... | 02/05/2008 |
| 4699220 | Row crop aerator A soil aeration machine with a straight main frame being attached to a tractor via a three-point hitch. The main frame carries standards to which deep tillage knives are attached. A coulter is mounted directly in front of each knife to cut through the res... | 10/13/1987 |
