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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 |
| 5984017 | Multi-function tillage apparatus and method In a tillage device having first and second plow assemblies mounted in parallel relation on a main frame to thereby cut furrows in the soil creating soil strips in so doing and depositing the soil strips on a berm between the furrows created by the plow a... | 11/16/1999 |
| 5063999 | Moldboard plow apparatus for switching soil strips from one furrow to another A moldboard plow apparatus having alternate and cooperating moldboards or so-called "scoops". The first of the moldboards digs out and lifts a first soil section from a ground surface thereby forming a first furrow or so-called "cut". The second moldboard... | 11/12/1991 |
| 4998488 | Agricultural combined drill dispenser Apparatus in an agricultural combination machine for simultaneously inserting and positioning in the earth of at least two components, e.g. seed and fertilizer, primarily a combination machine for direct sowing on a field without previous soil cultivation... | 03/12/1991 |
| 4319645 | Variable speed plow with moldboard pivoting about a forward vertical pivot axis A variable speed plow bottom has a moldboard structure (37) pivotally connected to a fixed portion which includes a frog (14) and a share (17). The pivotable moldboard structure (37) includes an arm (53) whose forward end (52) is pivotally journaled on a ... | 03/16/1982 |
| 4207952 | Plow In a plow, a share having a thickened rearwardly extending mid-section with narrow upper and lower edge portions. The thicker mid-section provides increased share strength and resistance to breakage to improve expected share life. The upper edge portion o... | 06/17/1980 |
