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-4,201,663 Method and apparatus for the enhanced treatment of food processing waste waters using aerobic microorganisms
A method and apparatus for treating waste water, containing large quantities of organic material, by means of an aerobic bacteriological process which uses a...
US-4,199,272 System for recharging aquifer and apparatus therefor
A system for recharging an aquifer comprising an opening into the aquifer, means for packing the opening with sized, coarser, clean gravel, filter sand above the...
US-4,193,550 Chemical injection head
A nozzle body of a molded spray head forms a path for a highly pressurized carrier fluid. The fluid path includes a rectangular-section, diverging outlet and a...
US-4,192,388 Wheel rut closing device for irrigation system
A wheel rut closing device for use in combination with an irrigation system having an irrigation line support or supports, each support having rotatably mounted...
US-4,188,644 Apparatus for controlling video tape presentation
A control system for video tape equipment operable to present video tape audio and visual testimony. The control system has a court monitor and a jury monitor...
US-4,188,160 Feed residue saver for combines
A feed residue saver attachment for combines has a trough adapted to be mounted in a transverse position beneath the rearward portion of a combine to receive...
US-4,186,956 Log carrier
First and second opposite side pairs of laterally spaced upstanding tong arms defining open sided recesses opening toward each other are provided. The tong arms...
US-4,177,667 Quick response humidity chamber
An apparatus and technique for changing the characteristics of a fluid mem in order to test static response of sensors within that medium. In particular, in...
US-4,176,779 Hydraulic inertia centrifugal catalytic desalination device
The present device separates salts from water by utilizing hydraulic force, the force of inertia, centrifugal force and the catalytic similarities produced by...
US-4,174,573 Black board line marking device
A desired marker such as a felt tip pen or a pencil or a chalk may be carried across a chalk board by mounting the marker on a clamp which is attached to an arm....
US-4,170,328 Desalination by the inverse function of the known (salting-out) effect within an improved centrifuge
Hydrogen gas is injected into sea water preceding treatment in an improved pocket type centrifuge. The catalytic effects of hydrogen gas within the confining...
US-4,165,118 Louvered tailgate with automatically adjustable vanes
The tailgate on a conventional pickup truck is provided with a plurality of vanes which pivot about their respective horizontal axes. Air pressure buildup in the...
US-4,162,968 Screen apparatus for sorting fragmented material
An improved sorting apparatus of the harp screen variety utilizes a plurality of elongated, parallel wire spacing strips positioned along a frame and carried on...
US-4,162,783 Electric fence cable assembly
An improvement in electrified cable assemblies for use with electrically charged fences is disclosed. The improvement provides for a dual conductor insulated...
US-4,160,999 Mounting arrangement for a television monitoring camera
A panel of a size to be inserted into a section of the hung framework of a suspended ceiling carries a housing, the lower portion of the housing projecting...
US-4,160,211 Method and instrument for measuring the sensitivity of a radio receiver
An RF carrier applied to the antenna input of a radio receiver under test is sequentially modulated with an audio signal to provide sequentially at the audio...
US-4,150,868 Battery connector clamp
A battery connector clamp has a cooperating pair of solid lead jaws having abutting inner ends that clampingly encircle a battery post and having grooved outer...
US-4,147,301 Heating system
A heating system comprises serially connected heating and holding coils connected in a closed heating liquid circulating circuit with a collector coil at the...
US-4,142,679 Building heating system
A heat jacket and flue assembly includes an air inlet in the attic for communication with humid outside air and an outlet adjacent the furnace in communication...
US-4,142,621 Mobile auger elevator with a flanged auger tube
The improved flight-type auger elevator disclosed herein is particularly adapted for conveying grain, granular materials and the like up relatively steep,...
US-4,141,581 Truck box liner
A liner for a truck box for increasing the volumetric load carrying capacity thereof. The liner is provided with wall portions extending higher than the walls...
US-4,141,167 Waterfowl decoy setting means
A decoy set comprising an anchor, main line including at least one decoy, and a highly elastic band connected in series between the anchor and main line.
US-4,141,166 Gun safety device
A firearm is disclosed including a safety mechanism having sensing of engagement of the firearm butt with an operator's shoulder and sensing of engagement of the...
US-4,137,801 Combined ratchet and torsion wrench
A combined ratchet and torsion wrench which in the preferred embodiment includes a drop-in drive mechanism which is a separate, integral subassembly which can be...
US-4,136,641 Livestock sorting gate
A livestock sorting gate having a chute forming a path for guiding animals toward a pair of pens disposed in opposite relation to one another laterally of the...
US-4,133,427 Arrow package
A package of arrows for shipment and display is constructed from a sheet of corrugated board, which is cut out to provide openings and formed with flaps having...
US-4,130,134 Material conveying apparatus
An apparatus for conveying materials having first and second support members movable longitudinally with respect to each other, a third support member positioned...
US-4,129,258 Automatic hydraulic series-parallel shift device for implement
An apparatus such as a farm implement or other mechanical device subject to varying loads and power requirements has an hydraulic circuit which automatically...
US-4,128,808 Channel frequency analyser
The percentage deviation of citizen band transmitter channel frequencies from the standard channel frequencies is determined by counting the difference between...
US-4,126,441 Method of rooting cuttings
Cuttings to be rooted are intimately contacted with water containing a catalytically effective amount of a novel catalyst. The cuttings root faster and/or...
US-4,125,366 Infra-red heated spray paint booth
The infra-red heated spray paint booth has positioned in the roof thereof an infra-red heater which extends the length of the booth. The heater includes a black...
US-4,125,233 Tethered aerodynamic balloon with integral fins
A non-rigid aerodynamic balloon having integral stabilizing tail fins is provided. The balloon is most useful in tethered applications, such as for advertising....
US-4,123,992 Clean out system for animal facilities
A circular area is provided having the floor sloping inwardly towards the center and having manure and urine disposal means within the center. A boom is...
US-4,123,552 Compositions for preserving crops and animal feedstuffs
Fungus and mold growth in crops and organic matter are inhibited by the use of bis-carboxylic acid esters and compositions thereof. In a preferred embodiment,...
US-D250,014 Louvered tailgate for pickup trucks
US-4,116,666 Method of treating seed
Seeds are intimately contacted with water containing a catalytically effective amount of a novel catalyst to achieve faster germination and/or a higher...
US-D249,665 Front discharge mixer truck
US-4,114,786 Garment hanger
A garment hanger having a body member and a pair of side arms pivotally attached to the body member, a vertical stem and pair of links each link being pivotally...
US-4,114,400 Safety sleeve
A safety sleeve for exposed rotating shafts, in particular, for cylindrical shafts with smooth outer surfaces. The safety sleeve includes an enclosure member...
US-4,113,107 Machine gun rack
An upstanding rack is provided including upstanding horizontally spaced apart opposite side uprights, horizontal base structure extending between the lower ends...
US-4,112,820 Tamper-proof axial tumbler type lock
An axial tumbler type lock having a split cylinder within a stationary lock casing contains a set of regular spring-urged split tumblers which bridge the shear...
US-4,111,445 Device for supporting a paraplegic in an upright position
A device for assisting paraplegics in standing and moving about. The device includes a platform mounted on casters so as to be movable and body restraining means...
US-4,106,645 Means for quick attachment of implement to a tractor
A device for the easy and quick connection of a front mounted implement to a tractor including a hook means adapted to lift the device and spring-loaded pin...
US-4,103,123 Grounding device
A procedure and apparatus for increasing the ease and safety of making grounding connections in electrical distribution systems having access areas including...
US-4,096,529 Circuit for detecting ghosts in TV antenna systems
The presence of ghosts or other similar interference in a television signal is detected and indicated by comparing the peak voltage levels of the horizontal...
US-4,095,933 Fuel handling and combustion system
A simple and highly efficient fuel handling and combustion system and method are provided. The system includes preheating coils surrounding a perforated outer...
US-4,095,563 Low pressure steam generator
A low pressure steam generator comprising a horizontal coil of tubing having a single upper steam outlet header and a pair of lower water inlet headers on...
US-4,093,036 Irrigation tower drive
An irrigation tower structure is provided including support and drive wheels for supporting and driving the tower from and over ground to be irrigated. The tower...
US-4,092,145 Method of prolonging the life or beauty of cut flowers
Cut flowers are intimately contacted with water containing a catalytically effective amount of a novel catalyst to prolong their life or beauty. In a preferred...
US-4,090,682 Pressure and hot air relief vents for a pressurized hot air airship
In a hot air airship including an elongate gas envelope aerodynamically shaped for horizontal flight with a pressure hot air generator for pressurizing the...
← 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.