Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
PatentStorm News
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 |
| 5343641 | Spreader bar for strip mine rigging apparatus A spreader bar assembly has a middle spreader bar having a nose-shaped link at opposite ends to which is pivoted pivotal end pieces which comprise about half of the structural weight. The pivotal end pieces have a rounded tip portion which is pivotally co... | 09/06/1994 |
| 5323129 | Resonator mounting apparatus A resonator mounting apparatus for use in a circuit (10) captively secures and positions a resonator (40) within a resonator cavity (15). The resonator mounting apparatus uses a pedestal (60) attached to the base (12) of the resonator cavity and a web sup... | 06/21/1994 |
| 5287920 | Large head downhole chemical cutting tool A downhole chemical cutting tool for use in a well bore to cut large diameter conduits including an elongated tool body having a chemical section adapted to contain a chemical cutting agent and a cutting section adapted to receive the cutting agent from t... | 02/22/1994 |
| 5279237 | Method of making a floating baby bather A baby bather has an open mesh coated fabric envelope filled to a soft cushion shape with lightweight buoyant foam plastic beads for supporting a baby floating in a tub or over a sink. The center portion of the cushion has a gradual depression having a ce... | 01/18/1994 |
| 5276968 | Apparatus for cutting vegetation Apparatus for cutting vegetation with a rotatable head carrying a non-metallic cutting line extended into a cutting plane. As the line extension decreases from an established preset length an actuator in the head permits additional line to be extended aut... | 01/11/1994 |
| 5277489 | Portable batch mixing apparatus for cementitious construction materials A portable system for on-site batch mixing of cementitious materials, such as mortar and grout, includes a batch mixing machine for metering and mixing cement, sand and water, a cement storage silo sized to hold at least one commercial delivery truckload ... | 01/11/1994 |
| 5273317 | Off highway truck frame A truck frame (100) for use hauling heavy loads in a dump body (14) pivotally attached thereto utilizes a first beam (102) as a central spline for the truck (10). The first beam (102) is constructed by welding steel sheeting together around a plurality of... | 12/28/1993 |
| 5269665 | Portable hand-held blower/vacuum unit with resilient engine mounting system A portable, hand-held blower/vacuum unit has a housing structure defined by an upper engine shroud removably connected to the top wall of a lower impeller housing. Disposed within the shroud is a small internal combustion engine having a vertical cranksha... | 12/14/1993 |
| 5266082 | Fuel additive Fuel additive compositions for improving the combustion efficiency of an internal combustion engine, and thereby substantially reducing undesirable motor vehicle exhaust emissions as well as fuel consumption. The composition is composed of a bicyclic arom... | 11/30/1993 |
| 5263964 | Coaxial traction detachment apparatus and method The present coaxial traction detachment system improves intravascular occlusion by providing a means for greater control in the placement of endovascular devices. The detachment apparatus (10) includes a guide wire (16) slidably disposed within a sheath (... | 11/23/1993 |
| 5263407 | Apparatus for preparing a folded food product An apparatus for preparing a folded food product having an exterior food wrap folded about an inner filling in a two-stage operation. In the first stage, the food wrap is automatically filled and partially folded in one direction. The partially folded foo... | 11/23/1993 |
| 5261201 | Prefabricated curved handrail structure and connection methods Prefabricated handrail fittings are disclosed which contain preformed internal slots which accept simple fasteners for quickly making mitered and butt joints without hand working in the field. A plurality of interconnected slots are arranged internally al... | 11/16/1993 |
| 5259230 | Method of positioning flat stock to be bent A plurality of notches are formed in one or both ends of long pieces of sheet metal by means of a notched template and a notching tool. The notches establish the break lines on the pieces. The side edge of a sheet metal bending brake is provided with an a... | 11/09/1993 |
| 5258582 | Apparatus and method for weighing aircraft A measurement device (10) is disclosed that uses the actual hydraulic cylinders of the aircraft landing gear to weigh the aircraft. The device (10) comprises a pressure-weigh sensitive transducer (12) with a flow-through passage (14) and adaptors (20a, 20... | 11/02/1993 |
| 5258158 | Positive-type non-return valve and method of using valve A positive-type, non-return valve (10) primarily for use with an injection molding machine utilizes a frame (12) which surrounds a first bore (34) and a second bore (32). The second bore (32) is accessed by inlets (30). Outlet passages (40) are located do... | 11/02/1993 |
| 5254389 | Void fill material A void fill material (10) can be formed from ordinary scrap cardboard into an interlocking packaging material. Each piece of the material (10) has a primary section (20) defining a primary plane. The void fill has at least two limbs extending from the pri... | 10/19/1993 |
| 5248872 | Device for optically reading marked ballots using infrared and red emitters A read head for optically scanning a ballot on which votes are cast by marking the ballot with a writing instrument within a voting area defined between a pair of spaced-apart timing marks includes infrared emitters illuminating the timing marks and emitt... | 09/28/1993 |
| 5243897 | Magnetically actuated fluid motor A magnetically actuated fluid motor has a shiftable member having valve members for alternately closing one and opening the other of large and smaller faces of a stepped piston reciprocating in a housing. The shiftable member carries a magnet and is shift... | 09/14/1993 |
| 5240077 | Voltage controlled hydraulic setting tool A setting tool for setting in a bore hole a downhole device such as plugs and packers is actuated by supplying a voltage signal to direct current motor that drives a hydraulic pump. The hydraulic pump delivers high pressure fluid to a setting chamber to d... | 08/31/1993 |
| 5237159 | Electronic check presentment system An Electronic Check Presentment System provides a bank with a fully automated capability for participating in the electronic exchange of check data. It allows banks that utilize the system to take MICR data that has been obtained through check capture met... | 08/17/1993 |
| 5233770 | Locking pin apparatus A one-piece locking pin (100) for use captively retaining a tooth (14) on an adapter portion (12) of an excavating tooth and adapter assembly has a primary wedge member (110) with an integral spring (120) extending upward from the member's distal end (116... | 08/10/1993 |
| 5234497 | Cementitious formulations and processes A fast setting cementitious composition which upon hydration with water forms a paste-like slurry useful in stopping leaks in the walls of cement pipes. The cementitious composition comprises a dry mixture of a hydraulic cement component having a first Po... | 08/10/1993 |
| 5232202 | Tank lifting methods A method of lifting storage tanks by using pressurized bags and support members. Lifting the tank allows for visual inspection under the tank for corrosion to prevent leakage of environmentally hazardous chemicals stored in the tank. The lifting bags are ... | 08/03/1993 |
| 5230649 | Duck call apparatus A two-piece duck caller device simulates the call of the mallard drake using a sounding body and a resonance chamber encompassing the sounding body. The sounding body includes an elongated blowing stem, a whistle portion with an air vent and a flared exha... | 07/27/1993 |
| 5226986 | Formulation of multi-component explosives Process for the formulation of a multi-component explosive composition from non-detonable components comprising a defined body of unconsolidated particulate aluminum fuel granules and an oxidizing liquid. Specific particulate aluminum fuel has an average ... | 07/13/1993 |
| 5227218 | Medical sheet and method of manufacture A cover sheet for medical tables, beds or gurneys comprises a sheet formed from a high tensile strength, plastic with opposed ends of the sheet folded and seamed to provide pockets. The pockets are inverted for assemblage over the ends of the medical tabl... | 07/13/1993 |
| 5222474 | Convection cooking oven with enhanced temperature distribution uniformity A gas fired convection cooking oven is provided with an improved air delivery and heat exchange structure for creating within the oven's cooking chamber a recirculating flow of heated air to cook food items supported therein. The structure includes a comb... | 06/29/1993 |
| 5224133 | Modular high speed counter employing edge-triggered code A high speed modular counter (100) utilizing a novel counting method in which the first bit changes with the frequency of the driving clock, and changes in the higher order bits are initiated one clock pulse after a "0" to "1" transition of the next lower... | 06/29/1993 |
| 5218347 | Apparatus for detecting hazardous gases A new and improved gas detection, concentration and warning apparatus is disclosed which includes a tin dioxide semiconductor gas sensor operated with a load resistor of a preselected value and power source for producing reliable and consistent gas concen... | 06/08/1993 |
| 5215151 | Method and apparatus for drilling bore holes under pressure A method and apparatus for directional drilling to recover hydrocarbons, thermal energy, or the like, by using coiled tubing while the well is under pressure so that high density drilling fluids to control the subsurface pressures during drilling are not ... | 06/01/1993 |
| 5211144 | Portable hand-held blower unit A portable, hand-held blower unit is powered by a small internal combustion engine having movable choke and throttle control elements linked to a single adjustment knob. Rotation of the knob between full throttle and full choke positions thereof simultane... | 05/18/1993 |
| 5208940 | Floor dryer and warning device A device for removing liquid and small particulate matter from various surfaces is provided. The device includes a single compartmentalized enclosure supporting a rechargeable battery, a vacuum source and an airflow booster system for drying the surface. ... | 05/11/1993 |
| 5203628 | Portable batch mixing apparatus for cementitious construction materials A portable system for on-site batch mixing of cementitious materials, such as mortar and grout, includes a batch mixing machine for metering and mixing cement, sand and water, a cement storage silo sized to hold at least one commercial delivery truckload ... | 04/20/1993 |
| 5197380 | Egg breaking machine This egg breaking machine provides a means for separating egg shell from the liquid part of the egg. The eggs (1), along with the egg holder, commonly called a filler flat, containing thirty or less eggs, are placed into the egg breaker pan (3). At one en... | 03/30/1993 |
| 5195564 | Gasoline dispenser with vapor recovery system A service station dispenser for gasoline with a vapor collection system processes the electrical signal typically produced by the fuel meter which represents the volume flow rate of fuel to the tank to control the displacement volume of an electrically dr... | 03/23/1993 |
| 5193726 | Sheet material dispensing apparatus Closure usable for dispensing tear off lengths of rolled sheet materials, including plastic trash can liners. A `roll top` door is included which incorporates in it a roller mechanism. The lower supporting body of the apparatus also has provided a roller ... | 03/16/1993 |
| 5191525 | System and method for extraction of data from documents for subsequent processing The present invention comprises an image based document processing and information management system and apparatus. It provides a more efficient method and apparatus for handling large volumes of form based business transactions using a digital image-base... | 03/02/1993 |
| 5187940 | Refrigerant recovery and purification system A refrigerant recovery and purification system is provided. A one-pass system removes refrigerant, filters and purifies it and condenses and stores the refrigerant in its liquid state for reuse. A collection tank is provided which separates the non-conden... | 02/23/1993 |
| 5188428 | Decorative simulated wheel cover retention system A decorative wheel cover apparatus is disclosed for relatively inexpensively simulating the appearance of a more expensive custom wheel. A wheel cover member, having a contoured body and circular inner and outer rims which accurately simulates the appeara... | 02/23/1993 |
| 5188880 | Void fill material A void fill material (10) can be formed from ordinary scrap cardboard into an interlocking packaging material. Each piece of the material (10) has a primary section (20) defining a primary plane. In a preferred embodiment, a first, second and third finger... | 02/23/1993 |
