Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6780216 | Air filter for computers A filter bag of rectangular shape is fitted over the computer to be protected. It has a main opening for receiving the computer, and is longer than the computer with the open-ended position extended beyond the computer and tied to close the main opening against the ... | 08/24/2004 |
| 6715517 | Portable self-contained unit for and method of handling polluting liquids An all-steel platform having a fluid-proof floor member with a channel at one side leading into a sump at the end of the channel. Fluid from the floor member flows into the channel and sump, and a pump in the sump for recirculating the fluid into containers on or ab... | 04/06/2004 |
| 6700225 | Digital electronic switching systems A standard high voltage circuit having a light bulb therein as a load. A low voltage DC circuit has a plurality of parallel manually actuated switches, with output contacts in the high voltage circuit and inputs in the low voltage circuit. A 7414 chip is ... | 03/02/2004 |
| 6634967 | Baseball umpiring system A T.V camera in center field beyond the playing field directed at the home plate along a main axis. The camera senses the baseball in the strike zone. A second T.V. camera directed at the home plate in direction perpendicular to the main axis, which also ... | 10/21/2003 |
| 6634282 | Sandwich machine An elongated frame made up of rails, and having a main endless belt conveyor for carrying parts of sandwiches, and completed sandwiches through the machine. A slicer carriage is mounted on and above the frame, having an endless slicer belt means parallel ... | 10/21/2003 |
| 6607769 | System for coring lettuce heads The apparatus includes a plurality of cutter blades arranged around a vertical central axis. The lettuce head is placed above the cutter blades, with the core directed downward, and it is pushed downwardly against the cutter blades, and the cutter blades ... | 08/19/2003 |
| 6550417 | Bookmark A single card having a pair of icons on each side thereof, distributed longitudinally. Each icon includes a representation of an open book showing facing pages and a dot indicating upper or lower locations on a page of the book. A letter R or L indicates ... | 04/22/2003 |
| 6464224 | Board game A board having yard markings representing a football field, with a hole at each yard marking, for detachably insertion of pins representing the scrimmage line, and the 10-yard line from the scrimmage line. Dice are rolled for determining the kind of play ... | 10/15/2002 |
| 6443921 | Carpal tunnel protector A glove for preventing carpal tunnel syndrome. It includes a flexible open-ended sleeve with a side thumb hole. It has a cushion on the inner surface of the front of the glove, which covers the carpal tunnel area. The sleeve is highly yieldable and elasti... | 09/03/2002 |
| 6378334 | Jewelry articles including small beads arranged in designs in decorative framework Decorative beads strung on a thread, and such string of beads are wrapped on a bead bar to form a tube of beads and the beads are threaded together to secure them in the tube form. The bead bar is one of many in a frame, and all the beads thus mounted in ... | 04/30/2002 |
| 6354759 | Connector for frame members A connector made of two pieces, each piece being a single one-piece stamping, the pieces having mutually engaging hooks forming camming elements. The pieces are mounted on the exterior surfaces of the members of the frame to be connected. The connectors a... | 03/12/2002 |
| 6298773 | Cover for controlling steam from boiling kettle A compound cover made up of a pair of cover parts of a diameter substantially the same as the kettle. The cover parts rest on the kettle in stacked arrangement, and are rotatable relative to each other. The parts have hole, therethrough in a common patter... | 10/09/2001 |
| 6296305 | Floatable infant safety seat A safety seat including a one-piece shell made of molded plastic with reinforcing elements imbedded therein. The shell has an interior space opening to the exterior and including a seat for an infant. The shell includes a detachable bail for holding playt... | 10/02/2001 |
| 6179022 | Molded one-piece weighing funnel Mold apparatus for molding a weighing funnel that has a large diameter central segment, and a hole at each end that is smaller than the central segment. A 2-part core is used, the two parts together forming the size and shape of the article to be molded, ... | 01/30/2001 |
| 6134997 | Tube cutter and method Hand held tool having a pair of gripper rollers and a cutter roller, all of which grip and hold the tube to be cut. An electric motor in the casing drives the gripper rollers and rotates the tube. A second motor in the casing moves the cutter roller into ... | 10/24/2000 |
| 6082999 | Interdental device and container A plastic dental article, including an outer container made up of an outer shell and a tubular insert. It also includes a stem having an interdental pick and a brush near the pick but spaced slightly therefrom. The container is non-spill, when turned over... | 07/04/2000 |
| 6070639 | Window shade assembly A main opaque shade, and one or more translucent shades, all on rollers, and capable of being individually drawn and retracted. They are positioned as in layers fore to fore and spaced from inner to outer positions, with the opaque shade outermost. The tr... | 06/06/2000 |
| 6070267 | Knee pad holder Loops secured the trousers sleeves of the wearer, on the exterior thereof, through which the knee pad straps are passed for holding the knee pad from sliding down the leg of the wearer.... | 06/06/2000 |
| 6036595 | Safety system for smoke and fumes A detector in a space to be sensed and controlled gives an electrical signal upon fumes in the space reaching a predetermined level. An electrical circuit is thereby energized to operate a fan to exhaust the space. Inlet and outlet openings in the structu... | 03/14/2000 |
| 6021707 | Safety means for tilting kettle A lift truck having horizontal arms straddling the kettle it is to lift, carry, and tilt. On the outer end of each arm is a tilting unit, one being a drive unit, and on the other an idler unit. These units grip the handles of the kettle. They are symmetri... | 02/08/2000 |
| 5971458 | Clothing carrier A tubular handle, a tubular main loop and a tubular connector piece together form a continuous loop threaded through the handle. A tubular slide lock is fitted over a mid-section of the main loop which is fitted together to form a double strand. All of th... | 10/26/1999 |
| 5967759 | Basement flash flood control system A main pump unit which includes a main pump and a standby pump in a tank is placed on the basement floor, not in a sump. The tank is sealed with the floor level drain, preventing reverse sewer water from flowing onto the floor. The pump (main) turns on be... | 10/19/1999 |
| 5957238 | Tool tray for ladders A one-piece, integral device made up of linear rods and having a basket portion and a hook portion, the latter for mounting it on a step ladder. The basket holds an ordinary tool box. Also the basket portion has side hooks for mounting extra tools and ins... | 09/28/1999 |
| 5921034 | Transportable workshop A self-contained compartment used in a construction site. It is all-steel, and it includes vertical lifting plates forming hooks welded to the frame of the compartment for insertion of the bucket of a construction machinery piece for carrying it.... | 07/13/1999 |
| 5921407 | Holder for holding surgical instrumentalities in spread arrangement A brush holder having a back panel for holding the brushes in spread position, and a trough in front at the bottom for holding related items. The entire back panel and trough are integral, and made of steel. Support hooks with transparent suction cups are... | 07/13/1999 |
| 5913491 | Paper roll holder A back plate and a pair of transversely spaced vertical side plates extending forwardly therefrom. A first of the side plates is rigid with the back plate, and the second side plate is pivotal on a forwardly extending horizontal axis. A spindle is secured... | 06/22/1999 |
| 5911652 | Roll-back exerciser A rectangular frame made up entirely of tubes and tubular connectors, and glue securing them together. The tubes are self-biased to straight shape, thus self-biasing the frame to a position lying in a common plane. The frame includes end members made up o... | 06/15/1999 |
| 5884927 | 2-way bicycle drive unit In a first form, a drive sprocket is driven constantly in a forward direction. It is mounted on a central main shaft. A pair of mutually opposed one-way clutches each have a driving part on the shaft and a driven part on the sprocket, and in pedaling in e... | 03/23/1999 |
| 5881837 | Tree climber step assembly The device includes a step and a handle as separate units. The step is made of two steel rods welded together, and having a threaded screw at one end to be driven into a tree. The user detachably attaches the handle to the step, and by swinging the handle... | 03/16/1999 |
| 5870799 | Grommet A soft member constituting the main portion, and a rigid member. The soft member has a loop rib integral therewith, and the rigid member has a loop base element almost entirely embedded in the rib. The base element has load pads spaced therealong for lock... | 02/16/1999 |
| 5860759 | Connector for frame members A pair of steel counterpart pieces, of steel, each being integral, and including a backing element, a side blade element, and a hook element. The side elements are on opposite side edges respectively of the backing elements. The pieces are mounted on fram... | 01/19/1999 |
| 5855209 | Patient's hand immobilizer A main panel of aluminum shaped to the hand, with side tab segments for bending over the wrist and the main part of the hand and over the ends of the fingers. It includes layers of sponge material glued to both of opposite faces of the aluminum layer.... | 01/05/1999 |
| 5839725 | Apparatus and method of playing a board game simulating teams playing in a tournament A board that has markings for placement of teams in tournament style. Teams are identified by chips bearing the names of the teams. Dice are provided for rolling to determine wins, and rates of advancement. Also cards are provided with instructions, for a... | 11/24/1998 |
| 5833196 | Desk top mat A mat for a desk or other type of furniture. It incorporates a plurality of layers glued together, including a bottom layer of cork, a middle layer made up of a single sheet of uniform plastic material, and a top layer. The top layer is any of wood, soft ... | 11/10/1998 |
| 5819766 | Beautician's helper A main stand having a base, a main post having lower and upper sections on the base, the upper section being releasably held in a socket on the lower section. A cross bar is mounted on the upper end of the post. Clips are mounted on the cross bar for rele... | 10/13/1998 |
| 5800340 | External penile support device A frame made of a single one-piece filament, bent at the middle to form a support loop which fits in the groove inwardly of the glans, support rods lead inwardly from the support loop where they are mounted in a joint, a detachable support ring being swin... | 09/01/1998 |
| 5729606 | Telephone cord holder A one-piece metal clip, of spring material, having spaced prongs at a second end forming a convex bearing point near a first end and a recess forward thereof. At a trailing end it has a re-bent hook. The clip is fitted on a releasable and detachable fitti... | 03/17/1998 |
| 5682711 | Game field A fixed domed structure, and a pair of movable units each having an arena for playing a game thereon. The fixed structure includes fixed amphitheater seats around a center void where a movable unit is located when in active position. One of the movable un... | 11/04/1997 |
| 5640771 | Hedge trimmer guard A transparent plate mounted on a sickle bar, adjacent the inner end thereof. The plate is located in register with the handle that is positioned on the sickle bar, to cover the cutting teeth more fully, at the location where it is held.... | 06/24/1997 |
| 5632458 | Lock box and stand A stand including a base and a standard made up of common tubular elements. An L-shape bracket is detachably mounted on the top of the standard. A lock box is mounted on the bracket. The bracket alternatively can be detached from the stand and mounted on ... | 05/27/1997 |
