Easy To Use Patents Search & Patent Lawyer Directory

At Patents you can conduct a Patent Search, File a Patent Application, find a Patent Attorney, or search available technology through our Patent Exchange. Patents are available using simple keyword or date criteria. If you are looking to hire a patent attorney, you've come to the right place. Protect your idea and hire a patent lawyer.

Searching: South Dakota





Search by keyword, patent number, inventor, assignee, city or state:




Patent # Description
US-4,648,190 Single shot falling block action
A falling block rifle action which is cocked by the downward movement of the breechblock and which includes a safety mechanism for blocking not only a trigger...
US-4,645,603 Liquid aeration device and method
In the treatment of livestock waste, liquid to be aerated is pumped from a storage container, holding pond or lagoon and drawn through a magnetic air inductor...
US-4,645,535 Method for the recovery of precious metals from ores
A process for the recovery of precious metals from ore containing the same is disclosed. The process includes the formation of a lixiviant solution including a...
US-4,644,244 Battery conditioner
A depolarizing device conditioning for small batteries includes an open ended housing for receiving and holding a large battery to be used as a source of...
US-4,643,209 Vehicle washing machine
Car washing apparatus which provides for multiple uses of washing fluid and an improved vehicle washing structure utilizing a single multi-nozzle manifold that...
US-4,642,845 Balance assembly for a window
This invention relates to a balance assembly for windows in which a gas pressurized piston and cylinder device with pulley wheels at each end acts as a balance...
US-D288,280 Transmission adaptor bracket
US-4,637,772 Loader mount
A mount for disconnectably attaching an appliance such as a loader on the front end of a tractor with the loader having a mounting frame with channels at each...
US-4,637,481 Self-propelled scale testing vehicle
A self propelled scale testing vehicle (20). The vehicle (20) includes a platform (22) supported about the surface of the ground by four wheels (34), the...
US-D287,793 Picture frame
US-4,635,617 Grease catch basin with solvent reservoir for use with cooking exhaust systems
For use particularly with exhaust systems from cooking areas, such as roof-mounted restaurant exhaust fans, a grease catch basin is mountable about the exhaust...
US-4,634,881 Apparatus for detecting impurities in translucent bodies
An apparatus including a source for producing a concentrated light beam, such as a laser, a background spaced from the source against which the light beam is...
US-4,632,629 Wheel lift apparatus for towing vehicles
A wheel lift towing apparatus is disclosed for mounting on the rear end of a tow truck or other towing vehicle for engaging the wheels of an immobilized vehicle...
US-4,630,006 Current-tuned transistor oscillator
A simplified current-tuned bipolar junction transistor oscillator is provided that is especially adapted for low power applications. The oscillator hereof...
US-4,624,189 Heated outlet valve for railway tank car
A valve attachment flange comprising the lading outlet for a railway tank car is placed in an insulative space between a heat element, heated fluid medium...
US-4,622,774 Animal trap
An improved animal trap adapted to be less injurious to a trapped animal because of a center mounted swiveling chain. The trap also has a flat base made possible...
US-4,621,446 Fishing rig
A fishing rig is disclosed, comprising a flat circular base member sized to cover a hole formed through an ice layer. A frame member is secured to the base...
US-4,616,173 Frequency counter
A frequency counter employs a temperature sensitive oscillator mounted in proximity to a master crystal oscillator to provide an output frequency which varies...
US-4,612,012 Corneal implant
Surgical replacement of all or a portion of the cornea may be performed through the use of an implant having a central lenticular portion, and a peripheral...
US-4,611,545 Conservation no till farming apparatus
A conservation no till apparatus for placing seed and fertilizer into the ground in one operation as pulled through the field includes a main implement frame...
US-4,610,558 Selectively free wheeling or drive hub for vehicles
The present invention discloses a self-contained hub assembly that can be placed onto the drive axles of a vehicle to provide either free wheeling of the wheel...
US-4,610,108 Balance spring locking slide block for tilt-out windows
The invention relates to tilt-out window assemblies in which a window sash may be rotated from its normal vertical position causing a slide block connected to a...
US-4,608,538 FM quadrature detector with ferrite bead tuned circuit
A quadrature detector circuit for demodulating frequency modulated information is provided that is particularly designed for use in television receive only...
US-4,605,239 Wheelchair tire and wheel cleaner
Tire and wheel cleaner for cleaning the wheels of wheelchairs. A mounting bracket is attached to the frame of the wheelchair and holds a support arm in one of...
US-4,603,733 Heated railroad tank car
A heated tank such as in a railroad tank car has a heat exchanger spaced from the bottom of the car to define a dead air space to insulate the heat exchanger...
US-D284,909 Picture frame
US-4,601,687 Machine for manufacture of H-divider containers having improved compression resistance
The present is a machine for forming an inside-outside Bliss-type H-divider shipping container. It is based on an adaptation of a Moen or similar type single...
US-4,600,119 Helical coil dispensing machine apparatus
Apparatus for dispensing small items. A removable dispensing tray has a spiral ejector, each coil of which is loaded with one item. The dispensing tray is placed...
US-4,597,324 Active ridge vent
An active ridge vent designed for providing varying degrees of ventilation at the ridge of a building such as a livestock building. An arm in combination with a...
US-4,594,966 Collapsible head covering for animals
A device for controlling the movement of an animal is provided which includes a cone-shaped covering (10) for the animal's head. The covering (10) is made from a...
US-4,594,647 Adjustable light
A trouble light is provided and consists of a reflector adjustably supported around an electric light socket for an electric light bulb with a guard to provide...
US-4,593,401 Endodontic film holder
An endodontic film holder is disclosed which holds radiographic film in place for the taking of X-rays without necessitating removal from the tooth the...
US-4,592,289 Reducing pollutant emissions from a spreader-stoker-fired furnace by stoichiometric control
Methods and apparatus for reducing pollutant emissions, and in particular, for reducing NO.sub.x and particulate emissions, from spreader-stoker-fired furnaces....
US-4,592,275 Method and apparatus for recovery of useful feed values from animal waste
A separator for reclaiming valuable nutrients not digested by livestock has an inclined bed with closely spaced slots therein and delivery means for a mixture of...
US-4,586,924 Vein constrictor and immobilizer
A vein constrictor and immobilizer device comprising a pressure plate and a pressure means. The plate has a top pressure face and a bottom engaging face. Both...
US-4,578,909 Insulated building construction
The present invention is directed to an insulated building construction which includes panels having interior and exterior skins with an insulating core...
US-D283,085 Picture frame
US-D282,789 Black belt
US-4,571,873 Black powder measuring device the pro-charger
A black powder measuring, transporting, and dispensing device which includes a cylindrical open ended body to receive and dispense powder for use in muzzle...
US-4,571,859 Notched ditcher chain tooth
The forwardly and outwardly inclined marginal edge of a conventional "cupped" ditcher chain tooth is provided with an elongated longitudinally extending shallow...
US-4,570,721 Device for weeding vine or similar crops
A device for weeding such vine crops as melons, cucumbers or the like comprising a tool bar adapted to be carried by a tractor. The tool bar in turn carries...
US-4,568,235 Low angle tilt trailer
A low-angle tilt trailer comprising a forward frame section which is adapted to be connected to a prime mover and having a rear frame section selectively...
US-4,567,856 Apparatus for spraying livestock
Apparatus for spraying livestock with liquid substances is disclosed. A liquid insecticide tank is mounted on a supporting base. A housing is provided mounted on...
US-D282,396 Carpet dryer
US-4,565,695 Synthetic pheromone 10-methyl-2-tridecanone and its use in controlling the southern corn rootworm and related...
A pheromonal compound produced by the southern corn rootworm has been identified as 10-methyl-2-tridecanone (10-M-2-T) having the structural formula: ...
US-4,564,805 Oscilloscope with integrated frequency counter and method of measuring frequency
The sweep trigger pulses generated internally in an oscilloscope are coupled to a pulse counter, which counter is reset periodically and a number proportional to...
US-4,563,649 Cathode ray tube tracking tester and method of testing
Tracking of the electron guns of a multiple-gun cathode ray tube system is tested by individually testing the emission current of each gun, storing voltages...
US-D282,068 Closed-circuit television system enclosure
US-D282,028 Boat chair
US-4,562,469 Method and apparatus for aligning traps in a television receiver
A video carrier, which is amplitude modulated with a fixed video pattern signal, and sync and blanking signals, is combined with an amplitude modulated I.F. trap...
← Previous | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | Next →

File A Patent Application

  • Protect your idea -- Don't let someone else file first. Learn more.

  • 3 Easy Steps -- Complete Form, application Review, and File. See our process.

  • Attorney Review -- Have your application reviewed by a Patent Attorney. See what's included.