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 |
| 4244215 | Autonomous navigation system An inertial navigation system utilizing a servo-controlled two-degree of freedom pendulum to obtain specific force components in the locally level coordinate system. The pendulum includes a leveling gyroscope and an azimuth gyroscope supported on a two-gi... | 01/13/1981 |
| 4219027 | Subcutaneous electrode structure A subcutaneous electrode structure particularly suitable for a chronic implant and for taking a low noise electrocardiogram of an active animal such as a rat, dog, monkey, cow or the like, comprises a thin inflexible, smooth disc of stainless steel having... | 08/26/1980 |
| 4214703 | Aircraft engine nozzle A variable area exit nozzle arrangement for an aircraft engine having a substantially reduced length and weight which comprises a plurality of longitudinally movable radial vanes and a plurality of fixed radial vanes, the movable radial vanes being altern... | 07/29/1980 |
| 4212297 | Micro-fluid exchange coupling apparatus In a micro-fluid exchange apparatus for exchanging fluid with an organ, such as the trachea or a blood vessel of a small animal, such as a rat or a mouse, a hollow needle, such as a syringe needle, is provided for penetrating the fluid conduit of the anim... | 07/15/1980 |
| 4204402 | Reduction of nitric oxide emissions from a combustor A turbojet combustor and method for controlling nitric oxide emissions is provided by employing successive combustion zones wherein after combustion of an initial portion of the fuel in a primary combustion zone, the combustion products of the primary zon... | 05/27/1980 |
| 4199448 | Reverse osmosis membrane of high urea rejection properties Polymeric membranes suitable for use in reverse osmosis water purification because of their high urea and salt rejection properties are prepared by generating a plasma of an unsaturated hydrocarbon monomer and nitrogen gas from an electrical source and fo... | 04/22/1980 |
| 4186749 | Induction powered biological radiosonde An induction powered implanted monitor for epidurally measuring intracranial pressure and telemetering the pressure information to a remote readout. The monitor utilizes an L-C oscillator in which the C comprises a variable capacitance transducer, one ele... | 02/05/1980 |
| 4184609 | Cryogenic container compound suspension strap The present invention is directed to a support structure formed from a compound strap consisting of two or more links of different thicknesses. More particularly, the compound strap includes a thinner link which is connected to the cool end of the inner s... | 01/22/1980 |
| 4168939 | Acoustically swept rotor Impulsive noise reduction is provided in a rotor blade by "acoustically sweeping" the chord line from root to tip so that the acoustic radiation resulting from the summation of potential singularities used to model the flow about the blade tend to cancel ... | 09/25/1979 |
| 4160508 | Controller arm for a remotely related slave arm A segmented controller arm configured and dimensioned to form a miniature kinematic replica of a remotely related slave arm. The arm includes a plurality of joints for affording segments of the arm simultaneous angular displacement about a plurality of pa... | 07/10/1979 |
| 4156304 | Biomedical ultrasonoscope The combination of a "C" mode scan electronics in a portable, battery powered biomedical ultrasonoscope having "A" and "M" mode scan electronics, the latter including a clock generator for generating clock pulses, a cathode ray tube having X, Y and Z axis... | 05/29/1979 |
| 4154230 | EKG and ultrasonoscope display A system is disclosed which permits simultaneous display of an EKG waveform in real time in conjunction with a two-dimensional cross-sectional image of the heart, so that the EKG waveform can be directly compared with dimensional changes in the heart. The... | 05/15/1979 |
| 4151612 | Spacesuit mobility knee joints Pressure suit mobility joints for use in interconnecting adjacent segments of an hermetically sealed spacesuit in which low torques, low leakage and a high degree of reliability are required. Each of the joints is a special-purpose joint characterized by ... | 05/01/1979 |
| 4137010 | Constant lift rotor for a heavier than air craft A rotor blade extended radially from a hub, characterized by an elongated spar and a plurality of axially aligned shells pivotally mounted on the spar, each having an aerodynamic center located in trailing relation with the spar and supported thereby for ... | 01/30/1979 |
| 4132829 | Preparation of dielectric coatings of variable dielectric constant by plasma polymerization A plasma polymerization process for the deposition of a dielectric polymer coating on a substrate comprising disposing the substrate in a closed reactor between two temperature-controlled electrodes connected to a power supply, maintaining a vacuum within... | 01/02/1979 |
| 4130471 | Microelectrophoretic apparatus and process New gel tray and lid assemblies designed for use in conjunction with slotted electrophoretic membranes have been developed to take advantage of recently improved microelectrophoretic accessories which include a multisample applicator capable of applying u... | 12/19/1978 |
| 4130490 | Electric discharge for treatment of trace contaminants A radio-frequency glow discharge reactor for removing trace oxidizable contaminants from an oxygen bearing atmosphere including a reaction chamber defined by an inner metal electrode facing a dielectric backed by an outer conductive electrode. In one embo... | 12/19/1978 |
| 4109644 | Miniature implantable ultrasonic echosonometer A miniature echosonometer adapted for implantation in the interior of an animal for imaging the internal structure of an organ, tissue or vessel. The echosonometer includes a receiver/transmitter circuit which is coupled to an ultrasonic transducer. Power... | 08/29/1978 |
| 4095593 | Cooling system for removing metabolic heat from an hermetically sealed spacesuit An improved cooling and ventilating system for removing metabolic heat, waste gases and water vapor generated by a wearer of an hermetically sealed spacesuit. The cooling system is characterized by a body suit having a first circuit for simultaneously est... | 06/20/1978 |
| 4094073 | Angle detector An angle detector for determining a transducer's angular disposition to a capacitive pickup element. The transducer comprises a pendulum mounted inductive element moving past the capacitive pickup element. The capacitive pickup element divides the inducti... | 06/13/1978 |
| 4061812 | Honeycomb-laminate composite structure A honeycomb-laminate composite structure comprising A. a cellular core of a polyquinoxaline foam in a honeycomb structure, and B. a layer of a non-combustible fibrous material impregnated with a polyimide resin laminated on the cellular core, A process for producin... | 12/06/1977 |
| 3971785 | Process for the manufacture of flowed-in aerosol can gaskets Process of lining aerosol can valve mounting cups with a gasketing composition comprising a carbon dioxide blocked polyamine dispersed in a liquid polyurethane prepolymer consisting of a free isocyanate group-containing reaction product of a polyisocyanat... | 07/27/1976 |
