In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7246614 | Lightweight, portable cooking stove A small, lightweight, portable cooking stove that utilizes alcohol as fuel and is suitable for backpacking, hunting, camping and similar activities. The cooking stove includes a combustion chamber which encloses, contains and regulates the entire combustion process.... | 07/24/2007 |
| 7216464 | Modular oven wall panel assembly A modular oven, such as a batch process oven, includes a standardized set of self supporting, interconnectable panels which, when assembled, from a self-supporting heat containment shell, free of added structural support members. The present invention is also direct... | 05/15/2007 |
| 6905332 | Modular oven, panel assembly and method of assembling the same A modular oven, such as a batch process oven, having a standardized set of self supporting, interconnectable panels which, when assembled, from a self-supporting heat containment shell, free of added structural support members. Also described are the self-supporting... | 06/14/2005 |
| 6769424 | Heater with heat resistant anti-oxidant coating on interior surfaces A heater for burning fuel having a hollow enclosure with an air inlet, and a combustion gas outlet. The enclosure has an exterior heat exchange wall preferably directly exposed to ambient air and an interior surface defining a combustion chamber. The enclosure has a... | 08/03/2004 |
| 6546926 | Brickless stove A wood burning stove in the shape of a barrel having both primary and secondary air inlets for supplying clean combustion. Primary air is fed into the stove from above the door. Secondary air is fed into a heating duct which extends along the bottom of th... | 04/15/2003 |
| 5913273 | Incinerator including vibrator and incinerator including drying chamber A waste incinerator including separate burning-, blower-, chimney- and ash-receiving chambers. A suction-discharge port is provided in a wall between the burning chamber and the chimney chamber for discharging gases from the burning chamber through a chim... | 06/22/1999 |
| 5651356 | Portable heater A portable heater comprising a fire chamber vessel, an outer enclosure container around the vessel for retaining it, the container bottom being spaced below the vessel bottom to define a vertical space therebetween, the container breadth being sufficientl... | 07/29/1997 |
| 5377661 | Wood burning stove for heating water A stove for the generation of heat from the burning of wood for heating water and for heating the room in which it is located comprising a drum having cylindrical side walls about a horizontal axis, support legs and circular end walls; an array of tubes i... | 01/03/1995 |
| 5347983 | Draft hood attachment device A novel draft hood for mounting on top of a gas conversion unit to form an adaptor and coupler between the gas conversion unit and a chimney includes a box structure having a guide flange and a plurality of positioning flanges thereon. A down draft divert... | 09/20/1994 |
| 5119799 | Lightweight collapsible woodburning stove This invention is a small, very lightweight, fuel efficient, collapsible woodburning stove comprising six parts that form a combustion chamber, and four supporting legs, all fabricated from thin sheet metal by cutting or die-stamping, and all held togethe... | 06/09/1992 |
| 4971045 | Portable, collapsible wood burning stove and uses for the same A new type of portable, collapsible wood burning stove that can be easily disassembled and assembled for use with very small pieces of wood or coal and when so used is environmently efficient comprising relatively small front and back metal plates having ... | 11/20/1990 |
| 4919109 | Pack kitchen with airtight stove and flue oven A sheet metal constructed modular pack kitchen including utility tables, sinks and cabinetry, along with an airtight wood stove and flue-mounted oven. When disassembled, the components self-store in nested relation within one another. The stove includes a... | 04/24/1990 |
| 4915091 | High efficiency combustion heater A cooker and/or radiant-heating space heater system comprises a plurality of arcuate sheet metal shell segments assembled with overlapping edge portions so as to form a substantially cylindrical inner shell surrounded by a plurality of similarly overlappi... | 04/10/1990 |
| 4896654 | Pollution neutralizing woodburning stove This invention concerns a solid fuel stove, in particular a wood stove fitted with a device capable of neutralizing the polluting elements of burnt gasses and that comprises, in a conventional manner, a chamber of combustion formed by vertical walls and t... | 01/30/1990 |
| 4724798 | Outdoor woodburning furnace An outdoor wood-fired furnace which heats water for domestic use and provides heat is disclosed. The furnace has a water jacket, sides, top and ends. A main distribution chamber is provided for air on its bottom with outlet means to the firebox. The water... | 02/16/1988 |
| 4558687 | Stove It is known to have solid fuel stoves made of cast iron and/or heavy steel. The stove of the present invention has a top section, a bottom section and a cylindrical body section therebetween. These sections define a primary combustion chamber. The top and... | 12/17/1985 |
| 4515144 | Hand-fired, solid fuel stove An inclined and perforated grate 20 is arranged in a hand-fired, solid fuel stove 10 having a fuel door 11, an ash pit 18 under grate 20, and a combustion air inlet opening 24 to a region under grate 20. Grate 20 inclines to slope downward with increasing... | 05/07/1985 |
| 4469083 | Wood burning stove A stove for burning solid fuel such as firewood. a lower level air inlet opening is provided for so-called "primary air," and another air inlet opening is provided at a higher level for so-called "secondary air." The volume of air introduced into the stov... | 09/04/1984 |
| 4461242 | Means for heating water by wood burning The wood burning water heating means of the present invention utilizes a firebox having a grate adjacent the lower end and a flue opening positioned downward from the upper end thereof. The flue extends into the firebox so as to deflect rising hot gases p... | 07/24/1984 |
| 4461275 | Apparatus and method for burning wood A thermostatically actuated arrangement for controlling opening and closing movement of the damper of a wood burning stove includes a duct arrangement extending through the combustion chamber of the stove between an air intake end opening through the stov... | 07/24/1984 |
| 4385620 | Method and means for heating by wood burning The wood burning heating means of the present invention utilizes a firebox having a grate adjacent the lower end and a flue opening adjacent the upper end thereof. A baffle is positioned immediately below the flue opening in such a manner as to deflect ri... | 05/31/1983 |
| 4311460 | Insulated industrial oven An industrial oven for heating products therein of the type having four insulated side walls, an insulated top, and also a bottom which together define an interior heating chamber. Each of the walls has an inner skin and an outer skin spaced apart from on... | 01/19/1982 |
| 4212286 | Sheet metal fireplace type stove A sheet metal stove comprising a shell of rectangular shape having a plurality of tubes extending between opposite sides thereof and extending therethrough to receive ambient air for combustion, adjustable dampers on the opposite ends of said tubes and sl... | 07/15/1980 |
| 4181116 | Stove A wood-burning stove has a vertically corrugated surrounding wall, the vertical corrugations having an outer side in direct contact with the atmosphere and an inner side directly contactable by the wood fuel. The corrugated wall has air inlets which can b... | 01/01/1980 |
| 4177791 | Wood-burning stoves A store having a parallelepiped-shaped combustion chamber and a parallelepiped-shaped flue chamber smaller in all dimensions than the combustion chamber and with four similar shaped flue outlet frames on the top, rear and sides thereof. The stove includes... | 12/11/1979 |
| 4169457 | Thermostatically regulated space heaters for burning wood, coal and the like A coal or wood-burning, thermostatically-operated space heater is shown and described. The heater includes a single thermostatically-operated draft control damper for controlling the supply of primary and secondary air to the fire chamber to avoid extreme... | 10/02/1979 |
| 4154211 | Log-burning stove A log-burning stove which contains a full refractory firebox, the stove designed to permit the easy insertion of large, economical, wood logs, particularly green logs, which stove comprises a shell defining a combustion chamber, the combustion chamber ful... | 05/15/1979 |
| 4138987 | Firebox with movable hood or hood sections A firebox having a hood or hood sections movable along or about a given line or point respectively on its hearth for positioning its opening in any one of a number of different positions.... | 02/13/1979 |
| 4136664 | Stove A freestanding space heating stove, presenting heat radiating flat faces of essentially equal surface, the faces being alike pentagonal plates of steel joined edge to edge forming a dodecahedron shaped hollow body wherein one of the plates provides a bott... | 01/30/1979 |
| 4121561 | Stove A box stove made essentially of two pieces of sheet metal bent into the forms of interlocking "U"s and assembled together. The stove containing a roof-shaped baffle below the flue exit.... | 10/24/1978 |
| 4117826 | Wood burning stove A wood or coal burning metal stove formed with a base, a top wall, a casing between the two and a lining extending completely around the lower part of the casing, the base having no openings for draft, but the draft openings being thru a casing door and t... | 10/03/1978 |
| 4117824 | Automatic wood burning heating stove An automatic wood burning heating stove has a fire chamber, a fuel feeding opening, closeable by an airtight door which is removable to convert the heater to an open fireplace. The door has a reflective ceramic surface on its inner face to direct heat tow... | 10/03/1978 |
| 4094649 | Briquette igniting device with foraminous metal cone A briquette igniting device including: an open-top container having a bottom wall and an upstanding peripheral wall with air inlet openings in the peripheral wall adjacent the bottom wall, the latter having a central depression to receive a liquid fuel, a... | 06/13/1978 |
| 4076010 | Factory-built fireplace spacer construction A factory-built fireplace having movable spacer members associated therewith for insuring a necessary minimum clearance between portions of an outer surface of the fireplace and combustible structural members used for permanent enclosure thereof. The spac... | 02/28/1978 |
| 4015580 | Safe heater This device consists primarily of a lightweight base to which by leg members, is secured adjustably, a firebox above which is the main heating chamber. The device includes an external pipe with a damper for introducing air into the breathing chamber for b... | 04/05/1977 |
| 3986488 | Fireplace A generally cylindrical casing is hollow, and is supported by a base so that the axis of the casing axis is horizontal. A vertical partition divides the casing into a fire chamber and a smaller exhaust chamber. The smaller chamber is vented to the outside... | 10/19/1976 |