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 |
| 4486972 | Animal trap An animal trap utilizes a generally X-shaped base to provide a balanced mounting of a pair of U-shaped jaws, a pair of torsion coil springs, and elements of a trigger mechanism. When the trap is set, the jaws are pivoted downwardly relative to the base an... | 12/11/1984 |
| 4411091 | Animal trap with support-suspension legs A pair of levers are provided including corresponding first base ends and second jaw ends. A pivot fastener pivotally connects the base ends of the levers together for relative swinging of the levers between first open positions with the jaw ends displace... | 10/25/1983 |
| 4366642 | Vermin trap A trap for mice or other small animals has an open-topped box-like base to which are hinged a striker and a combined bait holder and retainer, an elastic band tensioned between the striker and base urging the striker down from a raised or set position to ... | 01/04/1983 |
| 4308682 | Humane animal trap A humane animal trap includes a casing defined by upper and lower box-like sections, which are hingedly interconnected for telescoping together to a set position; springs biasing such sections apart to a sprung position; a latch mechanism for holding the ... | 01/05/1982 |
| 4250654 | Rotating frame animal trap A rotating frame animal trap has a specific form of frame design for insuring that the maximum clamping force between the jaws is developed at a jaw opening which corresponds to the dimension of a target animal. This frame design also produces generally i... | 02/17/1981 |
| 4236341 | Animal trap An animal trap comprising a first frame member made of strong metal rod, generally rectangular in shape and defining a striker bar and an anvil bar connected by side bars, said frame member also having extending bars fixedly connected to the frame at the ... | 12/02/1980 |
| 4183165 | Animal trap An animal trap including a base having first and second jaws pivotally mounted thereon. A trip plate pivotally carried by said base and a catch notch on said trip plate together with a catch bar pivotally carried by the base for engagement with a jaw and ... | 01/15/1980 |
| 4152861 | Animal trap holder A holder for animal traps of the Conibear type utilizing resilient fingers mounted upon an elongated body adapted to be supported on a stake. The fingers include recesses wherein the jaws of the trap are received in the recesses to support the trap in a p... | 05/08/1979 |
| 4146990 | Safety catch A safety catch for a rotating frame animal trap of round wire stock. The trap has two similar frames each frame having jaw forming sides and ends extending between the sides to support the jaws. The catch comprises a helix of an internal diameter about eq... | 04/03/1979 |
| 4128961 | Actuator for animal trap An actuator for a rotating frame animal trap. The actuator comprises two arms spring biased at one end to tend to move the other ends of the arms outwardly. Each arm terminates in a ring that is adapted to encircle adjacent frames of the trap. The ring on... | 12/12/1978 |
| 4127959 | Low impact animal trap An animal trap of the leghold type having low impact force is disclosed. The means for lessening the impact force of the jaws when they close takes one of three forms. The first is an inertial snubber. The second is an escapement mechanism. The third is a... | 12/05/1978 |
| 4117622 | Low impact animal trap An animal trap of the leghold type having low impact force is disclosed. The means for lessening the impact force of the jaws when they close takes one of three forms. The first is an inertial snubber. The second is an escapement mechanism. The third is a... | 10/03/1978 |
| 4117621 | Animal trap including spring-engaging inertial snubber to reduce initial jaw impact An animal trap of the leghold type having low impact force is disclosed. The means for lessening the impact force of the jaws when they close in an inertial snubber lying along the trap spring and engaged by the spring before impact of the jaws to thereby... | 10/03/1978 |
| 4107868 | Actuator An actuator for a rotating frame animal trap having two similar frames pivotally connected to each other. The actuator comprises two arms spring biased at one end and each terminating in a ring at the other. The rings have the dimensions so that the actua... | 08/22/1978 |
| 4065871 | Low impact animal trap An animal trap of the leghold type having low impact force is disclosed. The means for lessening the impact force of the jaws when they close takes one of three forms. The first is an inertial snubber. The second is an escapement mechanism. The third is a... | 01/03/1978 |
| 4045905 | Animal trap An animal trap comprising a base, a pair of generally U-shaped jaws journaled in said base for pivotal movement toward and away from each other between fully open and fully closed positions, U-spring means associated with the jaws and normally operative f... | 09/06/1977 |
| 3974592 | Forked stakes for animal traps A rotating frame animal trap is held between a pair of spaced prongs. Each prong has a pair of pegs protruding inwardly to straddle a respective pivot of the trap. The prongs are held together by a ring that slides into position by gravity after a trap is... | 08/17/1976 |