William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7347036 | Lawn mower towing device An assembly is provided for towing first and second push-type lawn mowers behind a riding mower. A base plate attachable to the rear of the riding mower releasably holds a tow bar. First and second tow arms are releasably coupled to the tow bar and are each adapted ... | 03/25/2008 |
| 5996704 | High row cane cultivator A towed, three row cultivator including a frame, a hitch bar, primary and secondary implement bars and vertical columns slidable within bearing housings attached at each side of the frame. The columns are attached to each other at the upper end by a bridg... | 12/07/1999 |
| 5881820 | Offset/tandom disc-type tillage implement An improved disc-type ground tillage implement for tilling ground. The implement has a frame connectable to a towing machine and having multiple pairs of gangs of blades connected to the frame. The frame is supported by a plurality of wheels which may be ... | 03/16/1999 |
| 5314028 | Adjusting devices for a semi-mounted plough The invention relates to an adjusting arrangement in a semi-mounted, preferentially reversible plough, comprising an elongate plough frame (4-6) carrying a plurality of plough bodies (9) and being supported on wheels (11). The elongated plough frame (4-6)... | 05/24/1994 |
| 5186261 | On-land plow assembly with a plurality of adjustable plow units A plow assembly adapted for connection to a tractor and including a plurality of plow units commonly connected to a beam which is inclined relative to the direction of travel of the plow assembly. A ground engaging steering wheel supporting a rear end of ... | 02/16/1993 |
| 4896731 | Reversible semi-mounted plow with a lockable articulation A multifurrow reversible semi-mounted plough comprising a large number of plough-bodies fixed on a beam. The beam is constituted by at least two elements (12) connected two by two via an articulation (13) about an axis (16), horizontal in the working posi... | 01/30/1990 |
| 4662161 | Pull-type windrower A pull type swather or windrower which can be used either singly or in a duplex or tandem arrangement can be adjusted from a working position to a transport position by pivoting the hitch through 90° and by unlocking the wheels so they turn through 90° ... | 05/05/1987 |
| 4637625 | Mower hitch assembly A lawn mower hitch assembly including a leading hitch device and a trailing hitch device secured to a respective leading mower vehicle and a trailing mower vehicle, and operatively connected to each other for free pivotal movement about a substantially ve... | 01/20/1987 |
| 4573309 | Pull-type windrower A pull-type swather or windrower which can be used either singly or in a duplex or tandem arrangement can be adjusted from a working position to a transport position by pivoting the hitch through 90° and by unlocking the wheels so they turn through 90° ... | 03/04/1986 |
| 4561797 | Universal clevis A pair of knuckles each including a base element and a pair of transversely spaced longitudinally extending lugs on the base element. The lugs on each knuckle are pivoted in a pair of lugs secured to the frame of one of the leading and trailing equipment ... | 12/31/1985 |
| 4415174 | Multiple implement towing apparatus A towing apparatus capable of being pulled over the ground by a single tractor and for towing multiple agricultural implements is provided with a main towing arm having at its end opposite the tractor hitch a vertically extending beam to which is pivotall... | 11/15/1983 |
| 4346909 | Transport mechanism for single and multiple unit pull type implements In its simplest form, a single unit implement such as a swather or the like, can be moved from field position to transport position by moving the rear offside wheels to the desired angle and fixing them in this position and allowing the near side rear whe... | 08/31/1982 |
| 4301872 | Plow with correlated pull bar adjustment and support wheel steering An articulated plow is provided with a laterally swingable pull bar (31) and steerable intermediate support wheels (46, 47) which are controlled by a hydraulic system providing correlated movement through parallel connected hydraulic jacks (37, 66). A lat... | 11/24/1981 |
| 4271913 | Articulated plow with horizontal angularity between its frames The horizontal diagonal angle (z) of the rear frame (16) of an articulated plow (11) is greater than the horizontal diagonal angle (y) of the front frame (14), thus providing a lead angle (x) between the frames (14, 16). This construction reduces the over... | 06/09/1981 |
| 4266618 | Articulated plow with central support providing counter moment for rear section An articulated plow has a front section 12 supported at its front end by a ground engaging furrow wheel 19, a rear section 13 supported at its rear end by a ground engaging furrow wheel 22, pivot joints 32, 33 interconnecting the diagonally disposed frame... | 05/12/1981 |
| 4245458 | Extendable tool bar for hay rakes A transversely extendable tool bar for multiple hay rakes which is adapted to be mounted directly to the three-point hitch of a farm vehicle so that the gang of rakes mounted on the tool bar may be simultaneously lifted from or adjusted relative to the ea... | 01/20/1981 |
| 4135582 | Plough This invention is a plough consisting of at least two booms pivotally connected together about a joint which can be locked to enable the booms to extend in line with each other, each carrying plough shares extending to one and the other side of the tracto... | 01/23/1979 |
| 4121852 | Releasably retained hinged plow A moldboard plow that is made in two sections which are hinged together about a horizontal pivot axis, so that the rear section of the plow can pivot about this horizontal axis relative to the front section to permit the plow to follow ground contours. Su... | 10/24/1978 |
| 4115984 | Arrangement for interconnecting a side delivery rake and a baler A support member is pivotally connected to a baler and projects laterally thereof. A side delivery rake is secured to the projecting end of the support member.... | 09/26/1978 |
| 4044842 | Flexible multi-section implement An implement frame construction includes rigid implement frame sections positioned in side-by-side relation and joined by a linkage system which permits the sections to universally flex within desired limits with respect to each other without substantial ... | 08/30/1977 |
| 4002334 | Dual frame offset disc implement with tongue members and a tow bar arranged for movement between side by side relation and a trailing relation An earth working apparatus in the form of a dual frame offset disc implement includes first and second tongue members and a tow bar arranged for movement of first and second mobile frames between a side-by-side earth working position and a trailing relati... | 01/11/1977 |
| 3983944 | Trailer plough with hinged boom parts This invention is a trailer plough having a double-length boom carrying twice as many shares as a conventional boom to enable a larger area to be ploughed at each pass of the tractor. The boom is in two parts connected together by a hinge having a univers... | 10/05/1976 |
| 3965989 | Flexible plow A large moldboard plow utilizing a multi-piece backbone or main frame connected by a hinge or hinges and a floatation land wheel or wheels. The hinge or hinges being arranged such that a uniform interval is maintained between the last plow bottom on the f... | 06/29/1976 |
| 3935907 | Coupling assembly for multiple implements A coupling assembly for interconnecting a pair of implements such as grain drills in end-to-end relation for towing behind a tractor for field operation and in an endwise direction for transport. The grain drills are connected to a tractor by conventional... | 02/03/1976 |