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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 5622229 | Harrow bar assembly A harrow drawbar assembly is described which includes a harrow frame with depending tines and at least one spring strap. The at least one spring strap has a first end and a second end. The second end of the at least one spring strap is secured to the harr... | 04/22/1997 |
| 5443127 | Spring tooth harrow A spring tooth harrow comprising an elongated tool bar having a plurality of harrow sections secured thereto by adjustable mounting brackets to enable the harrow section to be raised or lowered with respect to the draw bar. Each harrow section includes a ... | 08/22/1995 |
| 5358056 | Spring tooth harrow A spring tooth harrow comprising an elongated tool bar having a plurality of harrow sections cured thereto by adjustable mounting brackets to enable the harrow section to be raised or lowered with respect to the draw bar. Each harrow section includes a pa... | 10/25/1994 |
| 4368783 | Universal auxiliary implement mount A universal auxiliary implement mount for agricultural implements utilizes spaced, parallel, triangular plate members for attachment and selective positioning on respective tool bars of different main implements. A draw tongue is pivotally attached to one... | 01/18/1983 |
| 4330042 | Thatch loosening rake A thatch rake consisting of a frame carrying a multiplicity of downwardly projecting spring teeth dragging the ground and supporting the frame, said teeth being biased forwardly and downwardly but sprung rearwardly by forward motion of the frame, each too... | 05/18/1982 |
| 4256185 | Mulch loosening rake A mulch loosening rake consisting of a frame carrying a multiplicity of downwardly projecting spring teeth dragging the ground, said teeth being biased forwardly and downwardly but sprung rearwardly by forward motion of the frame, each tooth having a stop... | 03/17/1981 |
| 4127341 | Adjustable deflection limiting element for trailing arm assembly For use in a trailing arm assembly having a support frame and a spring-loaded trailing arm pivotally mounted on the support frame, an adjustable stop element is provided for limiting the downward deflection of the trailing arm. The stop element is a rotat... | 11/28/1978 |
