In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 5632345 | Rototiller skirt assembly A free-floating skirt assembly for attachment to the deck of a cultivator to protect adjacent vegetation from the blades of the cultivator includes a pair of elongate straps attached to the cultivator deck with shield supports projecting outwardly from th... | 05/27/1997 |
| 5415234 | Rotor tiller skirt assembly A skirt assembly (20) for a rotor tiller (10) includes a pair of shields (21,22) positioned substantially vertically at the outer extremities of the tines; and a framework (23). The framework (23) includes a pair of strap members (24,24) mounted to the de... | 05/16/1995 |
| 4592428 | Plant protective apparatus A plant protective fender for use with earth working machines such as rototillers comprises, in one embodiment for use with machines having rear-mounted tines, a support member fixedly attached at a selectable distance from the frame of the machine and a ... | 06/03/1986 |
| 4516789 | Crop clearing mechanism A mechanism for clearing paths through a crop bed for the wheels of a tractor includes a pair of power driven vertically, parallelly disposed rotatable cylinders positioned forwardly of a wheel to be moved through a crop bed. The cylinders are rotated in ... | 05/14/1985 |
| 4323125 | Rotary weeding machine A rotary weeding machine for the culture of plants in rows is disclosed. The machine comprises a transverse tool bar adapted to be attached to the regular three-point hitch of a tractor, two wheels mounted one at each end of the tool bar for supporting th... | 04/06/1982 |
| 4171725 | Rotary harrow Improvements in rotary harrows whereby an odd number of soil-working members are rotatably journalled thereon, the members having an even number on each side of a gear box located over one of the members, the gear box being in driving engagement with mech... | 10/23/1979 |
| 4066130 | Dirt shield for roto tiller A dirt shield for a rotary digger such as a roto tiller includes a shield member mounted outwardly of a rotary earthworking member rotatably mounted on the digger for keeping dirt away from plants adjacent the digger and enabling rows in a field or plot t... | 01/03/1978 |
| 4051904 | Soil cultivating implements A soil cultivator or harrow has a row of soil working members that are driven about upwardly extending axes to work the soil. A plant screen at each lateral side of the implement has a forward guide portion that is pivoted to the front of the frame and a ... | 10/04/1977 |
| 4046202 | Cultivators A tractor drawn cultivator comprises a frame extending transversely to the direction of movement of the tractor. A plurality of spaced apart vertical axis rotary driven cultivator members comprising downwardly extending tines are supported from the frame.... | 09/06/1977 |
| 3985186 | Plant guard for cultivator A plant guard for a cultivator having cultivator elements mounted on a horizontal rotating shaft. The guard comprises a U-shaped member, as viewed in plan, having a vertical, plate-like base which extends transversely of the direction of travel and is con... | 10/12/1976 |
| 3985185 | Tiller combination A support device is mounted on the center frame of a garden tiller and extends beyond the opposite sides of the garden tiller. The support device is adjustable in the dimension corresponding to the width of the garden tiller. Adjustable mounting devices a... | 10/12/1976 |
| 3978929 | Rotor tiller with attachment therefor A wheeled attachment arm assembly, mountable alongside a power rotor tiller apparatus to which a rake or a blade may be fastened for preparing the surface of the ground, prior to tilling it. The assembly incorporates an arm which is threaded into and exte... | 09/07/1976 |