In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5830021 | Outboard motor engine arrangement An outboard motor powered by an engine positioned within a cowling is disclosed. The engine has a block with a cylinder head attached at one side, the block and cylinder head defining vertically arranged combustion chambers. Air intake runners extend from... | 11/03/1998 |
| 5809924 | Clutch controlled steering device A steering device for a motor attached to a boat which device includes an elongated steering arm having electrical means for starting and stopping the motor, the steering arm secured within a clutch mechanism wherein clutch sleeves are tightly rotatably m... | 09/22/1998 |
| 5791954 | Vertically adjustable stern mounted marine drive A stern mounted vertically adjustable propeller and rudder marine drive. The aft end of a propeller shaft, the propeller, the rudder and printle and a skeg are vertically moveable to adjust a boat's draft for use in the water and when trailering. A stern ... | 08/11/1998 |
| 5788545 | Trim angler sensor transmission for a marine drive Trim angle sensor transmission for a marine drive arranged between a drive input and a drive output. The transmission has a rotatable input member (22) being rotatable between the angular trim limits of a marine drive, and is connected to an input (31) of... | 08/04/1998 |
| 5755604 | Boat propeller drive unit Boat propeller drive unit, comprising a frame-like carrier (1) intended to be fixedly joined to a boat transom, and a propeller rig (4) which is suspended in a fork (13) for trim and tilting movement relative to the fork about a horizontal axis (a). The f... | 05/26/1998 |
| 5743773 | Propulsion system for watercraft A small, compact electrically operated outboard motor for use with a very small watercraft. A substantial portion of the propulsion device for the outboard motor is intended to be submerged and is mounted for steering and tilt and trim movement. These mov... | 04/28/1998 |
| 5725402 | Wireless marine propulsion trim/tilt control system A wireless remote control for the trim/tilt of a boat propulsion system including a plurality of transmitters, each capable of generating a signal on two channels and a receiver control responsive to each of the two signals and capable of synthesizing a t... | 03/10/1998 |
| 5707262 | Wireless trim control system for boat drive A system for controlling adjustment of the outboard drive unit of a boat by operation of switches mounted on the steering wheel of the boat. The system provides an "up switch, a "down" switch and a transmitter, each of which is adapted for attachment adja... | 01/13/1998 |
| 5679036 | Reversible motor mount for canoe A reversible motor mount that can be attached to the gunnel on either side of a canoe is disclosed. The mount has a movable piece with a bracket to which said motor is clamped. The movable piece is locked in a first position when the motor mount is mounte... | 10/21/1997 |
| 5647781 | Outboard motor support An outboard motor support for preventing damage from inadvertent pivoting of the motor during trailering is provided which includes a pair of spring-loaded locking pins for convenient placement and removal. The support is attached to the motor and boat wi... | 07/15/1997 |
| 5647780 | Vertically adjustable stern drive for watercraft A marine stern drive includes a tilt/trim and lift adjustment mechanism which raises and lowers the drive while maintaining an established trim angle. The adjustment mechanism includes a parallelogram linkage system. An upper lever of the linkage system i... | 07/15/1997 |
| 5616058 | Lift arrangement for outboard motor engine A lift arrangement for a marine engine permits the output shaft of the engine to be vertically oriented when lifting the engine. The engine configuration results in a center of gravity located along a vertical axis which passes through a flywheel assembly... | 04/01/1997 |
| 5609506 | Outboard boat motor transport stabilizer The invention provides a device for stabilizing an outboard motor during transport in two embodiments. A first preferred embodiment includes a rigid block which is pivotally mounted from a bracket so as to be adjacent to a yoke which connects between the ... | 03/11/1997 |
| 5599216 | Method and apparatus for stowing and unstowing an engine in a dinghy A method and apparatus for stowing and unstowing an engine in a dinghy. The apparatus includes a bracket to which the engine is attached. The bracket is pivotally attached to the transom of the dinghy through a transfer plate having two substantially perp... | 02/04/1997 |
| 5586535 | Engine rotational number controller An engine rotational number controller includes an engine rotational number detector 5 for detecting the number of rotation of an engine, a throttle opening detector 7 for detecting a throttle opening of the engine, an ignition device 11, a stepping motor... | 12/24/1996 |
| 5564956 | Steering and speed control mechanism for trolling motors A steering and speed control mechanism is disclosed for a hand-controlled trolling motor. The mechanism includes a yoke assembly having a first section attached to the trolling motor and a second section hingedly attached to the first section. There is a ... | 10/15/1996 |
| 5556310 | Protective assembly for the steering ram of a marine outboard motor A boot system interactive with an access port of a marine outboard engine and adapted to protectively enclose an elongated steering component emergent from the access port includes an elongated resilient hollow boot and an internally threaded receiving nu... | 09/17/1996 |
| 5549492 | Outboard motor An outboard motor incorporating a unitary mounting assembly for resiliently connecting the steering shaft to the driveshaft housing. The mounting assembly also closes an upper portion of the driveshaft housing and has an opening that passes a water tube f... | 08/27/1996 |
| 5545064 | Control for outboard motor A throttle and transmission control assembly adapted to be mounted on the tiller of an outboard motor for controlling its transmission and throttle. Both the transmission and throttle controls employ devices that convert rotary into reciprocating motion a... | 08/13/1996 |
| 5536187 | Outboard jet drive for watercraft A jet propelled watercraft having an outboard motor type of jet propulsion unit. The jet propulsion unit is disposed in substantial part forwardly of the transom and beneath the undersurface of the hull for improving its pumping efficiency. The jet propul... | 07/16/1996 |
| 5525082 | Transom travel support for deep vee hulls A trailer for transporting boats including a hitch, a frame including a pair of parallel side rails, a cradle and an axle with wheels, the improvement comprising a rear cross member with arms that will rotate about a bolt in the frame and drop down for un... | 06/11/1996 |
| 5514012 | Trim arrangement for outboard motor A trim pin arrangement for an outboard motor wherein the trim pin apertures are disposed so as to extend substantially in a straight line to make the bracket more compact and also so that the trim pin will engage the swivel bracket at a different location... | 05/07/1996 |
| 5509833 | Boat propulsion unit Boat propulsion unit comprising a suspension arrangement (2) and a propeller drive shaft housing (3) which, via a lower and an upper universal joint (22, 24, respectively), are pivotally connected to each other. The suspension arrangement comprises a fram... | 04/23/1996 |
| 5505155 | Submarine propulsion system A submarine propulsion system for a submersible vehicle has two motors mounted on respective support arms able to rotate about two axes relative to the submersible vehicle. Rotation of each arm about its first axis moves its respective motor out of a stor... | 04/09/1996 |
| 5499792 | Electric trolling motor mount A low cost and easily mounted and removed electric trolling motor mount with optional fixed rudder is provided comprised of a structured bar with two slidable adjustable clamp assemblies to affix the mount to the gunwales of a boat. The optional fixed rud... | 03/19/1996 |
| 5498181 | Outboard motor power head assembly Disclosed herein is an outboard motor including a fore and aft center plane and comprising a powerhead assembly including a two stroke internal combustion engine including a cylinder block including a port side, a starboard side, a plurality of vertically... | 03/12/1996 |
| 5465678 | Piece of hull for boats and vessels A piece of hull of a boat, vessel or other construction designed to travel over water, which piece is attached with devices to the rest of the hull in a manner that allows the pieces of hull to move relative to each other. The piece of hull is located par... | 11/14/1995 |
| 5453030 | Trolling motor auxiliary handle apparatus The present invention is an auxiliary steering handle apparatus adaptable to most boat mounted trolling motors. The apparatus is comprised of two main components, the pivotal telescopic handle or lever and a split gear housing or case. The pivotal handle ... | 09/26/1995 |
| 5437568 | Water jet propulsion unit A number of embodiments of watercraft having jet propulsion units contained within a tunnel in the hull and wherein the jet propulsion unit is pivotal about a first transversely extending horizontal pivot axis for bringing the jet propulsion unit through ... | 08/01/1995 |
| 5403216 | Ship propulsion arrangement A main propulsion arrangement for a high power ship or the like comprises an underwater drive unit connected to and turnable by a substantially vertical tubular shaft journalled in the ship. The drive unit and the tubular shaft define a hollow casing encl... | 04/04/1995 |
| 5401197 | Hull A number of embodiments of hull arrangements for watercraft that permit forward positioning of the propulsion device but also permit the hull to be constructed as a planing hull. In some embodiments, jet propulsion devices are disclosed and in another emb... | 03/28/1995 |
| 5397257 | Drive extender for a stern drive unit and such a unit incorporating the extender A kit, an assembly and the combination of these with a boat's stern drive unit for the purpose of extending the propeller rearwardly of the boat to increase the trim height adjustment range and leverage. The kit and the assembly include an extruded spacer... | 03/14/1995 |
| 5389017 | Folding boat transom A folding transom for a boat having a trolling motor. The folding transom having an "engaged position" and a "retracted position". The transom including a motor mounting bracket, a pair of parallel horizontal legs, having first and second ends, each leg b... | 02/14/1995 |
| 5378178 | Tiller arm and steering bracket assembly A tiller arm and steering bracket assembly where the tiller arm is pivotally coupled to the steering bracket such that it can be selectively positioned in either a generally horizontal position or a generally vertical position. The tiller arm includes an ... | 01/03/1995 |
| 5370564 | Outboard motor An outboard motor having a power head in which an exhaust expansion chamber is provided that receives the exhaust gases from the engine and delivers them to an underwater exhaust gas discharge. The expansion chamber is affixed to the engine and forms at l... | 12/06/1994 |
| 5346416 | Exhaust system for outboard motor An outboard motor for mounting on the transom of a boat, has a horizontal engine and output shaft, an exhaust system having a high speed exhaust discharge includes a horizontal portion and a vertical portion having an enlarged cross sectional water jacket... | 09/13/1994 |
| 5317982 | Ship A displacement ship having a hull, a stern 6 which at least in the region of the underwater body form a flat surface to which the longitudinal axis of the ship is a normal, the hull at least in the region of the underwater body, narrowing towards the ster... | 06/07/1994 |
| 5310369 | Water jet propulsion unit A number of embodiments of watercraft having jet propulsion units contained within a tunnel in the hull and wherein the jet propulsion unit is pivotal about a first transversely extending horizontal pivot axis for bringing the jet propulsion unit through ... | 05/10/1994 |
| 5279242 | Tiller arm for outboard motors A remote control tiller arm is provided for controlling the operation of an outboard motor. An inverted U-shaped steering boom is attached to the outboard motor and extends over-the motor boat operator. The steering boom includes a throttle mechanism for ... | 01/18/1994 |
| 5261841 | Control for jet propulsion unit of watercraft A watercraft having a jet propulsion unit that is supported at least in part within a tunnel on the under side of the hull and which is movable between a driving position and a service position. The control for operating the jet propulsion unit to move it... | 11/16/1993 |