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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 4294026 | Elevating earth scraper An improved earth moving machine for removing topsoil and transporting the soil to another location for unloading and distribution. The earth moving machine includes a frame, a primary mover for the earth moving machine mounted in the frame, a bowl pivota... | 10/13/1981 |
| 4288279 | Apparatus for producing bags of plastics material Apparatus for producing a bag of plastics material having an opening closable by a flap which is provided with a band of adhesive for securing the flap to the bag after closing of the opening, the band of adhesive being covered by a releasable strip of pl... | 09/08/1981 |
| 4287511 | Intrusion alarm system utilizing structural moment detector as intrusion sensor and as receiver for mechanical intrusion and command signals Structural moment detectors are carried by structural components, such as floors, walls, etc., within a desired secure area of a building structure. The structural moment detector detects deflections of the various structural members in response to change... | 09/01/1981 |
| 4285934 | Treatment for herpes virus A treatment for herpes virus infections comprises topical application of a suspension of boric acid, tannic acid, and salicylic acid, preferably in an ethanol solvent/carrier. Typically, a solution would have about 15% wt each of tannic and boric acids to... | 08/25/1981 |
| 4284285 | Self-adjusting rotary chuck A chuck having self-closing jaws, and a key-threaded rotary ring to engage said jaws in working contact with a tool within their grasp or to disengage said jaws so as to permit their free movement. The jaws themselves are such that the act of performing w... | 08/18/1981 |
| 4283943 | Method and apparatus for indicating and adjusting the angular position of a sail Apparatus and method for indicating and adjusting the angle between the horizontal tangent to the luff of a sail and the direction of the apparent wind.... | 08/18/1981 |
| 4274567 | Shopping cart organizer An organizer attachment for use on a shopping cart of the type having a transversely extending handle and a forwardly spaced-apart transversely extending rod. The organizer includes a substantially flat desk panel provided with clip means on outer surface... | 06/23/1981 |
| 4272203 | Apparatus for adapting an office machine to one-handed operation Apparatus for modifying a key-operated office machine such as a typewriter to adapt the machine to one-handed operation. A depressible bar member is shaped and dimensioned to be operatively positioned below and across the keyboard and a pair of mounting a... | 06/09/1981 |
| 4271828 | Method for maintaining the reduction of a sliding esophageal hiatal hernia A method for maintaining the intra-abdominal reduction of a sliding esophageal hernia. The method comprises positioning a generally C-shaped cushion prosthesis around the distal esophagus between the diaphragm and stomach. The overall size of the prosthes... | 06/09/1981 |
| 4271827 | Method for prevention of gastro esophageal reflux A method for preventing gastro esophageal reflux when the gastro esophageal junction is positioned above the diaphragm. The method comprises positioning a generally C-shaped cushion prosthesis about the distal esophagus, adjusting the free ends of the pro... | 06/09/1981 |
| 4271677 | Self-contained roof-mounted vehicle air-conditioning system A self-contained air-conditioning system for a vehicle, adapted to be mounted on the vehicle roof. The air-conditioning system includes an air refrigeration system comprising compressor, evaporator, condenser and fans operatively associated therewith, an ... | 06/09/1981 |
| 4270260 | Method for the salvage and restoration of integrated circuits from a substrate Components such as IC's mounted on a substrate such as a PCB are removed from the PCB in a heating apparatus. The heating apparatus has a mounting frame which positions the PCB above an array of infra red heating sources. The method includes the steps of ... | 06/02/1981 |
| 4266781 | Resilient rotatable toy A toy adapted to be thrown toward and rotatably rebounded off of a surface and retrieved in mid-air for developing hand-eye coordination and manual dexterity. The toy comprises a resilient ball, an elongate shaft attached to the upper portion of the ball ... | 05/12/1981 |
| 4263973 | Laser beam level control with automatic override A laser beam level control system for an earth-moving machine is provided with an automatic override function to temporarily block blade-down signals and raise the blade when lowering it or leaving it at its previous height would increase the force requir... | 04/28/1981 |
| 4261766 | Method for inhibiting fatigue of aluminum A method of inhibiting the fatigue of aluminum comprising the steps of immersing aluminum in an aqueous solution of a water soluble cyanide compound at room temperature and continuously maintaining the aluminum in contact with the aqueous solution. The aq... | 04/14/1981 |
| 4256199 | Self-powered, cable-mounted trolleys and building rescue system A self-powered, cable-mounted trolley for moving the load along a cable includes a housing, pulleys including at least one driven pulley journaled for rotation in the housing for frictionally engaging the cable passing therethrough and a motor and transmi... | 03/17/1981 |
| 4252160 | Attachment for beverage faucets An attachment for a beverage faucet, the faucet comprised of a normally closed valve, a handle for opening the valve, and a delivery nozzle in fluid communication with the valve, which prevents the handle from opening the valve until a drinking glass is p... | 02/24/1981 |
| 4250838 | Method for systemic control of parasitic insects A method for systemic control of insects on animals which includes the step of continuously contacting the skin of the animal with chlorpyrifos to establish and maintain an insecticidally effective concentration of chlorpyrifos in the animal's blood strea... | 02/17/1981 |
| 4248477 | Furniture construction A furniture construction comprised of a unitary base, supports, attached at their lower ends to the base, rising upwardly and outwardly from the base, and individual work surfaces attached to the upper ends of the supports. A peripheral area of free space... | 02/03/1981 |
| 4245947 | Self-loading car-top carrier A weather-protected, self-loading car-top carrier adapted to transport bulky loads and described in an embodiment suited for the transport of small motorized vehicles such as used by handicapped persons comprises a fixed rail assembly and a weather-protec... | 01/20/1981 |
| 4242030 | Self-loading car-top carrier for wheelchairs or similar sized loads A self-loading, weather protected carrier for raising or lowering an object to and from the top of a motor vehicle and for transporting the object on a motor vehicle. The carrier comprises a horizontally disposed base adapted to be mounted on the roof of ... | 12/30/1980 |
| 4242013 | Method for forming a hole in the earth In forming holes in the earth, a circular frame of columns supported by structural members is placed in the earth to provide lateral support for the side walls of the hole while the hole is being excavated and after the hole is excavated. The structural m... | 12/30/1980 |
| 4241914 | Elastic apparatus for resisting and assisting a person performing exercises Apparatus for assisting or hindering a person performing exercises. The apparatus consists of a frame and at least one elongate elastic member attached at either end thereof to the frame. The yielding resistance and position of the elastic member in the f... | 12/30/1980 |
| 4238986 | Method for altering tonal characteristics of a stringed musical instrument The bridge has a pair of elongate feet forming the contact between the bridge and the table of the instrument. The feet extend at right angles to the bridge in direction substantially parallel to the grain of the wood from which the table is formed. Metho... | 12/16/1980 |
| 4208791 | Arcuate razor head An arcuate razor head is shaped to conform to convex and concave body surfaces. Cutting edges are emplaced in inclined arcuate surfaces, one above the other. The inclined surfaces guide the cutting edges at an efficient cutting angle as the razor head is ... | 06/24/1980 |
| 4153264 | Golf cart A golf cart of the manual pull type having a main vertical frame member to which a golf bag is attached. A pair of wheel assemblies are clamped to the main frame member at opposite sides of the frame. Each wheel assembly includes a transverse shaft attach... | 05/08/1979 |
| 4150096 | Process for treating combustion gases A process for removal of particulate material and sulfur dioxide from a gas stream by washing the gas stream in a treatment zone in a wet scrubber by injection of a reactant such as high calcium or magnesium lime to control pH in the range of 6.0 to 8.5. ... | 04/17/1979 |
| 4106620 | Surgical blade dispenser A surgical blade dispenser includes a box for storing blades in such position that a scalpel handle can be inserted through an aperture in one wall of the box to lockingly engage one blade and remove it from the box through the aperture. The blades are in... | 08/15/1978 |
