Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8028951 | Hydrogen powered aircraft Disclosed is an aircraft, configured to have a wide range of flight speeds, consuming low levels of power for an extended period of time, while supporting a communications platform with an unobstructed downward-looking view. The aircraft includes an extendable slat ... | 10/04/2011 |
| 8011616 | Hydrogen powered aircraft Disclosed is an aircraft, configured to have a wide range of flight speeds, consuming low levels of power for an extended period of time, while supporting a communications platform with an unobstructed downward-looking view. The aircraft includes an extendable slat ... | 09/06/2011 |
| 7806365 | Long endurance hydrogen powered vehicle Hydrogen powered air vehicles that in some embodiments can fly with very long endurance (10 or more days) at altitudes over 60,000 ft carrying payloads of up to 2,000 pounds. Embodiments may include features such as large wingspan relative to fuselage and an all com... | 10/05/2010 |
| 7637457 | Rankine-Brayton engine powered solar thermal aircraft A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight... | 12/29/2009 |
| 7318565 | Electric motor assisted takeoff device for an air vehicle A takeoff assist device for an air vehicle, such as an unmanned air vehicle is provided. The device features an electric motor and is much less complex and lighter than takeoff assist devices heretofore known. A body member is shaped to fit to a portion of the air v... | 01/15/2008 |
| 7281681 | Hydrogen powered aircraft Disclosed is an aircraft, configured to have a wide range of flight speeds, consuming low levels of power for an extended period of time, while supporting a communications platform with an unobstructed downward-looking view. The aircraft includes an extendable slat ... | 10/16/2007 |
| 7270295 | Solar thermal aircraft A solar thermal powered aircraft powered by heat energy from the sun. A heat engine, such as a Stirling engine, is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller. The heat engine has a thermal battery in thermal cont... | 09/18/2007 |
| 7240492 | Fuel system used for cooling purposes A hydrogen fuel system in which the fuel is transformed from liquid to gas is used to administer cooling, e.g., air conditioning. The system incorporates first and second stage heat exchangers. The first stage exchanger is used to benefit from the endothermic reacti... | 07/10/2007 |
| 7165744 | Turbine engine arrangements A fan turbine engine arrangement is provided in which a core engine is aligned such that an input of a nacelle is aligned with the upwash of a wing to which the arrangement is secured. The engine drives a fan such that bypass flows produced by the fan are guided by ... | 01/23/2007 |
| 7108229 | Arrangement and method for the generation of water on board an aircraft An arrangement and a method are proposed for the generation of water on board an aircraft with the use of one or more fuel cells, whereby low-temperature fuel cells are provided as fuel cells. It is proposed that several single-cell or few-cell fuel cells may... | 09/19/2006 |
| 7059136 | Air turbine powered accessory An aircraft accessory system includes an aircraft engine powered direct air turbine driven accessory and an air turbine drivingly directly connected by an air turbine shaft to the accessory. The air turbine includes a variable geometry turbine nozzle in selectable d... | 06/13/2006 |
| 6969027 | Vertical takeoff and landing apparatus A vertical takeoff and landing apparatus is excellent in the maneuverability and postural stability of its airframe, serves to protect a pilot from an impact when landing, and can make extremely stable flight when hovering near a building. An airframe has a propulsi... | 11/29/2005 |
| 6808145 | Dual-mode airbreathing propulsion system The present invention includes a method for a dual-mode propulsion system. During the first mode of operation, intake air is liquefied through a cooling heat exchanger and condenser using a combination of stored liquid hydrogen (LH2) and stored liquid nit... | 10/26/2004 |
| 6568633 | Fuel cell powered electric aircraft Electrically powered aircraft having fuel cells as at least a partial source of electrical energy. In many instances the electrical energy powers an electric motor used to propel the aircraft. In some instances, the electric output from the fuel cell woul... | 05/27/2003 |
| 6283410 | Secondary power integrated cabin energy system for a pressurized aircraft Increased efficiency of operation in pressurized aircraft may be obtained by employing pressurized air to be discharged from an aircraft cabin 10 as combustion air by applying it to the inlet 42 of a cycle compressor 40 whereat it is compressed before bei... | 09/04/2001 |
| 6224016 | Integrated flexible solar cell material and method of production A novel energy producing flexible material is provided particularly suited for high altitude and stratospheric applications. The flexible energy producing covering includes a flexible solar cell layer, a flexible substrate which preferably matches the sha... | 05/01/2001 |
| 5743489 | Aircraft with two alternatingly operated propellers of different radius An aircraft has at least one drive motor coupled to first and second propellers for forward thrust of the aircraft. The first propeller is dimensioned for takeoff and landing conditions and for flight conditions below a predetermined first flight altitude... | 04/28/1998 |
| 5167117 | Method and apparatus for cooling an airplane engine An apparatus for cooling components of an airplane engine at least partially operated by a cryogenically stored propellant via cooling air includes an air supply line for supplying the cooling air from an outside environment. A heat exchanger exchanges th... | 12/01/1992 |
| 5106035 | Aircraft propulsion system using air liquefaction and storage An aircraft propulsion system includes a propeller for propelling the aircraft, an electric motor for driving the propeller, and an electrochemical fuel cell for receiving an oxidizer and providing propulsion power to the electric motor. An air liquefacti... | 04/21/1992 |
| 5074489 | Method and system for supporting an airborne vehicle in space A method and system for supporting an airborne vehicle in space over a predetermined location and for an extensive period, comprises coupling the airborne vehicle by cables to a plurality of unmanned aircraft each having its own propulsion system; control... | 12/24/1991 |
| 4907764 | Infrared radiation powered lightweight aircraft A high altitude reconnaissance platform is implemented by an ultralight aircraft powered solely by long wave infrared cells mounted on the lower surfaces of the wings and the fuselage. The aircraft may be of the pusher, slow speed propeller style, with a ... | 03/13/1990 |
| 4524552 | Mechanism for deploying a deployable truss beam A deployment system for a deployable truss structure particularly adapted to space applications which has high structural efficiency and can be remotely operated in a controlled, sequential manner. The truss in its deployed configuration exhibits a "diamo... | 06/25/1985 |
| 4164896 | Control alternating system A cabin pressure control system has two independent controllers, one of which is used as primary controller while the other serves as standby. On alternate flights the identity of primary and standby controller are switched so that both controllers will b... | 08/21/1979 |
| 4007892 | Aircraft flight method and apparatus for boosting an aircraft to a very high altitude and thereafter boosting the aircraft to a high rate of forward speed This invention relates to a method and apparatus whereby functioning airborne conventional aircraft and engine combinations may be assisted during flight in attaining above normal airspeeds and/or altitudes; for the purpose of improving their performance ... | 02/15/1977 |
| 3981466 | Integrated thermal anti-icing and environmental control system An integrated thermal anti-icing and environmental control system for a gas turbine powered aircraft uses hot high pressure bleed air from the turbine compressor to de-ice the wings and the engine air inlet, and supplies conditioned air for the aircraft c... | 09/21/1976 |
