Quotables
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4907468 | Pedal effort-reduction apparatus A pedal effort-reduction apparatus according to the present invention comprises a pedal arm and a lever which is movable as one therewith. First and second torsion coil springs are provided between the lever and a support bracket. The first coil spring ur... | 03/13/1990 |
| 4878056 | Key input circuit A plurality of key switches are provided, each of which is connected, at one end, to the ground, and at the other end, to a power supply, by means of a resistor. The key switches are coupled, at the connection point with the resistor, to input buffers. Ea... | 10/31/1989 |
| 4851626 | Key switch device A rubber spring is disposed on a base on which are mounted fixed electrodes. The rubber spring includes first and second cup sections. The first cup section is in the form of an inverted cup, whose top portion is smaller in diameter than the bottom portio... | 07/25/1989 |
| 4807145 | Method and apparatus for measuring the shape, size, etc., of a rotary tool An apparatus for measuring the shape and size of a rotary tool is provided which includes a tool rotation unit for rotating the tool around the tool axis, a tool moving mechanism for moving the tool in the axial direction, a measuring head having a line s... | 02/21/1989 |
| 4800774 | Pedal-load lightening apparatus A pedal-load lightening apparatus comprising a pedal arm and a lever rockable in one therewith. A torsion coil spring is provided between the lever and a support bracket. The coil spring urges the pedal arm to return to its initial position before the arm... | 01/31/1989 |
| 4772874 | Keyboard apparatus A capacitive keyboard apparatus including a plurality of keys and a matrix of capacitive switches arranged in columns and rows and connected to the keys, respectively, wherein first and second drive signals sweep the columns of switches and first and seco... | 09/20/1988 |
| 4659879 | Key switch A key switch including a substrate prepared from dielectric material, and first and second electrodes respectively formed on the bottom and top surfaces of the substrate to constitute a capacitor together with the substrate. The first electrode is electri... | 04/21/1987 |
| 4633900 | Constant airflow control apparatus for air conditioning A constant airflow control apparatus is connected to an air duct of an air conditioning system to keep the flow rate of air fed from the air duct constant. The apparatus comprises a rectangular pressure receiving plate slidably mounted on a guide shaft ex... | 01/06/1987 |
| 4584444 | Keyboard switch A keyboard switch is provided with an insulating substrate, a first electrode laid on the insulating substrate, a second electrode formed of a conical coil spring and facing the first electrode, a dielectric disposed on the first electrode, a button posit... | 04/22/1986 |
| 4553696 | Air conditioning apparatus An air flow rate sensor and throttle valve which controls the opening of a duct in accordance with the detection signals from the air flow rate sensor are provided in a control duct between a supply chamber utilizing double ceilings and the air diffusers ... | 11/19/1985 |
| 4491061 | Air conditioning system In an air conditioning system, a damper unit disposed in the middle of a circulating duct is controlled so that a throttle valve of at least one of air quantity regulating devices for controlling incoming outside air quantity and exhaust air quantity is f... | 01/01/1985 |
| 4482932 | Keyboard switch A keyboard switch comprises an insulating substrate, a first electrode laid on the insulating substrate, a second electrode formed of a conical coil spring and facing the first electrode, a dielectric disposed between the first and second electrodes, and ... | 11/13/1984 |
| 4449664 | Air quantity regulating apparatus for air conditioning An air quantity regulating apparatus for air conditioning according to the present invention has two functions one of which is a constant air quantity function and the other is a variable air quantity function in cooperation with a room thermostat. When a... | 05/22/1984 |
| 4406397 | Central air conditioning equipment Central air conditioning equipment which performs air conditioning for a plurality of rooms, comprises a terminal air quantity control unit which is installed in order to communicate with each room and which controls the quantity of the air stream which i... | 09/27/1983 |
