U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.

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Bagnell, David


Primary examiner statistics: 3552 patents; average approval time: 3550 days
Assistant examiner statistics: 464 patents; average approval time: 591 days

Patents as Assistant Examiner


1                      
NumberTitleIssue Date
5431483Submarine solution mining containment and regulation cover and method
Oceanographic mining uses a flexible cover draped over a submarine ore-bearing stratum. The cover serves as a blanket-like structure for application of a leaching substance and isolation of the leachate and stratum from the surrounding water. The leachate...
07/11/1995
5228525Adaptor for earth boring machine
An adaptor assembly for an earth boring machine includes a thrust bearing housing removably attachable to the bulkhead plate of an earth boring machine surrounding the torque hub flange. A rear drive flange is attached to the torque hub and a front drive ...
07/20/1993
5197267Grass cutting unit
A grass cutting unit with a conventional cutter reel has forward and rear rollers mounted on a common, pivotable, carriage. By adjustable pivoting of this carriage the height of cut can be adjusted while maintaining strict parallelism between the rollers....
03/30/1993
5067775Retainer for rotatable bits
A retainer for rotatably retaining a mining tool or a wear resistant sleeve in a support block includes a removable collar consisting of at least two semiannular members each having a flange extending from its inside diameter and a groove disposed about i...
11/26/1991
5054858Selectively phased water supply of a cutter head
A mining machine having a boom and a rotary cutting head has water jets directed to the picks of the head and apparatus to phase water supply to only those picks engaging the face to be cut. The water supply system includes circumferentially disposed cham...
10/08/1991
5048274Apparatus and method for controlling multiple functions of an agricultural implement
Apparatus for controlling multiple functions of an agricultural implement such as a baler or a harvester includes first, second and third hydraulic cylinders which are operated to control first, second and third functions, respectively, of the implement. ...
09/17/1991
5046783Tunnel boring machine
Tunnel boring machine comprising a transmission housing (11) which during boring is fixed relative to the tunnel. The boring head (15) is axially displaceable relative to an outgoing shaft (14) of the transmission housing while transferring torque from th...
09/10/1991
5040850Tool supporting structure for use in material removing machines
A tool supporting structure which can be used in a mining machine has a mobile base with a cylindrical opening, a socket which extends in the direction of movement of the base and is located downstream of the opening, and a projection extending counter to...
08/20/1991
5037160Flooring remover
An apparatus for the removal of flooring is described. The apparatus is powered by an internal combustion engine which moves a series of crawlers. A blade is attached to a blade-holder which is situated on the front of the flooring remover. The blade is m...
08/06/1991
5037159Apparatus for collecting and packaging hazardous particulate materials
A method and apparatus is described for vacuum collecting and packaging of particulate materials, such as hazardous radiation contaminated concrete dust generated by floor scabbling, which avoids release of even small quantities of the material into the s...
08/06/1991
5035108Mower deck dedicated to grass collection
A mower deck including a shroud having a top, a discharge opening, first and second sides, the discharge opening located adjacent the second side and a peripheral skirt defining an open bottom, a plurality of cutting blades mounted to the shroud, each bla...
07/30/1991
5033796Safety blade gripping assembly for power operated floor stripper
A power-operated, floor stripping apparatus includes a frame, a drive carried on the frame, wheels supporting the frame, a handle to guide the frame, and a cutter blade carried by a head which is pivotally mounted to the frame. The head has a lower end to...
07/23/1991
5033257Conditioner roll tension system
A mower conditioner includes a main frame having a header connected thereto by a four bar linkage which permits the header to float over the ground during harvesting operation. The header carries upper and lower conditioner rolls with the opposite ends of...
07/23/1991
5033795Method of mining a mineral deposit seam
A method of mining seams is provided for a mineral deposit situated beneath a substantial overburden, such as would be found in a mountaintop ridge formation previously mined by contour mining operations so that roadways exist at the sides of the ridge fo...
07/23/1991
5033258Power lawn mower assembly and system for supporting bag thereon
A mower assembly comprising a grass-catcher bag having an inlet connector for mounting its inlet to the outlet of the mower's grass-discharge outlet, and having a bag-mouth closure at its opposite end mounted on the mower handle. The inlet connector is of...
07/23/1991
5031964Cutting chain for mining machines
An endless chain for carrying cutting elements for a mining machine comprises a plurality of pivotally interconnected link elements, some of which are constructed to mount outwardly projecting cutting tools. The link elements are pivotally interconnected ...
07/16/1991
5031963Method of downhole hydraulicking mineral resources
A method of downhole hydraulicking mineral resources includes production panels being laid out at a deposit, holes being sunk in a longitudinal axis of each production panel, and device for hydraulicking mineral resources, comprising a monitor and a means...
07/16/1991
5031389Double mower
A construction having two separately operable mowers driven by a single tractor unit. The tractor drives our double gear box, which is operably connected to drive two laterally spaced separate gear boxes, each of which drives grass cutting blades. Each of...
07/16/1991
5031394Swather attachment for bi-directional tractor
A mounting structure for attaching an elongated swather head to a tractor of the bi-directional type, the structure mounting the head in front of the tractor in a swathing direction of travel and accommodating swinging movement of the head to a trailing t...
07/16/1991
5032037Method and apparatus for temporary matting for use at construction sites
A three ply mat and matting system for constructing temporary access roads and work surfaces over areas of poor soil conditions. The mats comprise upper and lower layers of longitudinally offset wooden boards separated by an intermediate layer of transver...
07/16/1991
5029943Apparatus for transmitting data
Apparatus for transmitting data relating to a mining machine in a longwall mining operation, comprising a data collection device mountable on a mining machine for collecting data relating to the machine, a data transmission device also mountable on the mi...
07/09/1991
5030175Chain joint construction
A chain link assembly is fabricated from a plurality of links joined together in articulated relationship with each of the links having a first end with a complementary pitch opening and a second end with a complementary opening. A barrel having an inside...
07/09/1991
5029655Drilling machine for drilling large drilling holes in rock, particularly underground
A drilling machine for drilling large drill holes in rock, especially underground, comprises a support, a rotary drilling drive longitudinally displaceable on the support in a drilling direction and provided with a reducing transmission and drive motors. ...
07/09/1991
5029437Mower deck outrigger suspension
A mechanism for coupling a mower deck to a powered vehicle and having push arms pivotally connected to the vehicle between the front wheels of the vehicle and coupled to the front portion of the deck for pushing the deck in front of the vehicle. A member ...
07/09/1991
5028170Apparatus and method for continual removal of reinforced pavement with simultaneous separation and rendering of a bulk component from a reinforcement component thereof
A system is provided for forcibly drawing a flexibly-supported, acute angled, wedge under an existing stretch of a predetermined width of reinforced pavement to initiate removal thereof from the ground below. Gravity-assisted impact hammers apply downward...
07/02/1991
5028169Epoxy floor finishing method and machine
A method and apparatus for smoothing epoxy flooring material utilizes a weighted chassis to the bottom of which are mounted two planar blades in angular adjustable manner. A handle mounted pivotally to the top of the chassis may be brought forward to tilt...
07/02/1991
5028092Impact kerfing rock cutter and method
A low velocity, high mass ram is connected to the cutting tool. The cutting tool has an array of impact forward and side buttons or bars which form chip-forming spaces there between. The side buttons or bars advantageously cut a gage in the slot. A method...
07/02/1991
5026205Apparatus and method for continuously removing existing reinforced pavement and simultaneously replacing the same by a new pavement
A mobile pavement replacement system (MPRS) is provided for forcibly drawing a flexibly-supported, acute-angled wedge under an existing stretch of a predetermined width of reinforced pavement to initiate removal thereof from the ground below. Gravity-assi...
06/25/1991
5024278Harvesting machine having blower damage prevention means
A harvesting machine is especially adapted for automatic topping and loading of crops, such as onions. The crops are gathered from the field and elevated on a conveyor to a region adjacent to which a topping device (a sickle) is disposed. The conveyor has...
06/18/1991
5024487Method of creating an underground batch retort complex
Complexes of underground batch retorts, designed to duplicate surface retort prototypes proven successful in use, which may extend for miles on branch drifts intersecting central main drifts above and below the retorts, the main drifts emerging at surface...
06/18/1991
5024051Bolted double sickle cutterbar
A reciprocating cutterbar of the type utilizing a pair of counter-reciprocating sickles driven at the opposing outboard ends and overlapping at the inboard ends thereof is disclosed wherein the knife sections are detachably affixed to the respective suppo...
06/18/1991
5020859Apparatus for disintegrating monolythic entities
An apparatus for disintegrating monolythic entities including a body defined by two thrust plates capable of movement in a direction perpendicular to the longitudinal axis of the body. The body accommodates two parts similar in shape which contact the inn...
06/04/1991
5020860Methods and apparatus for maintaining longwall face alignment
Mine panel alignment is controlled by recording the electromagnetic phase modulation and/or signal attenuation between spaced distant transceivers in the panel and a transceiver on a cutting machine to measure the distance between the transceivers. Throug...
06/04/1991
5021030Straw spreader for a combine harvester and method of spreading
A straw spreader for the rear straw discharge of a combine comprises a frame mounted on ground wheels together with a pair of hitch arms which extend forwardly from the frame on either side of the rear portion of the combine for attachment to the combine ...
06/04/1991
5018793Rotationally and axially movable bit
The present invention relates to an improved cutting bit adapted to be rotationally and axially movable within the block cutting bit assembly. The invention further includes a spring for dampening the axially transmitted forces which the bit is subjected ...
05/28/1991
5018590Electromagnetic drilling apparatus
Oil drilling apparatus for drilling deep boreholes. The apparatus includes a high frequency, high voltage, AC generator at the surface of the ground which is connected to an electromagnetic hammer drill bit located at the bottom of the borehole. Electric ...
05/28/1991
5018792Impact ripper apparatus with linear reciprocating ram
Impact rippers are useful for transmitting high impact blows to a hard material for fracturing the material. When linear reciprocating rams are used, a mounting arrangement which will withstand high compressive forces and still allow the ram to reciprocat...
05/28/1991
5016942Anchor boring unit
An anchor boring unit includes a base plate attached to a loading apron of a section advance machine, with a square tube swivelling around a vertical axis and movable by a hydraulic cylinder attached to the base plate. Another square tube is telescoped in...
05/21/1991
5016943Milling device for cutting up road surfaces
A milling device for cutting up road surfaces which includes a roller-type milling body including a rotatably-mounted spiral conveyor, a plurality of rotary cutters carried on the spiral conveyor, the rotary cutters mounted for free rotation about their r...
05/21/1991
5015039Hydraulically actuated mechanical rock excavator
An apparatus (10) for placing a hard compact material such as rock surrounding a drill hole into axial tension for the purpose of breaking and excavating the material by virtue of a dual piston (23) and (25) arrangement disposed within a fluid cylinder (1...
05/14/1991
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