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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 5513347 | Data transfer system A data transfer system for transferring a transfer frame including a plurality of character codes representing a numeral of numerical data to be transferred, error detection data including a parity code for the character codes and a predetermined transfer... | 04/30/1996 |
| 5136285 | Portable data transmitting/receiving apparatus A receiver receives measurement data output as a radio wave from a measuring unit for measuring a physical or chemical value of an object to be measured together with a data type (ID data) for identifying the measuring unit. The measurement data and the d... | 08/04/1992 |
| 5055011 | Electromagnetic type reciprocating pump An electromagnetic type reciprocating pump comprises an electromagnet whose magnetization and demagnetization are repeated by a half wave-rectified version of alternating current or direct current in the form of pulses, a piston having a magnetic member w... | 10/08/1991 |
| 5008665 | Measuring device having transmitter A measuring device having a transmitter includes a measuring device section, a data processing unit, a transmitter, and a casing. The measuring device section converts measuring data into a digital value and outputs it. The data processing unit arranges t... | 04/16/1991 |
| 4988268 | Air compressor An air compressor comprises an air-compressing section and a pulsation-absorbing tank which are arranged isolated from each other, a nozzle, provided for one of the compressing section and the pulsation-absorbing tank, for supplying compressed air from th... | 01/29/1991 |
| 4973957 | Data collecting system A host apparatus collects the physical or chemical quantities of articles, which have been measured by a plurality of measuring devices, for example, vernier calipers. Each calipers has a caliper unit as a measuring means, a dip-switch, a CPU, a RAM, and ... | 11/27/1990 |
| 4930096 | Data-transmitting apparatus having connecting plug A caliper unit has a connector having connecting terminals. The caliper unit measures a value of a product, and generates digital data representing this value. A data-transmitting apparatus has a housing. The housing can be attached to caliper unit. The h... | 05/29/1990 |
| 4924482 | Data-transmitting apparatus The analog data representing a value measured of a product by means of a measuring device such as a vernier calipers is converted into digital data by an analog-to-digital converter. A CPU incorporates the digital data into a data message. The CPU is driv... | 05/08/1990 |
| 4914609 | Displacement measuring apparatus An oscillator outputs an oscillator frequency corresponding to a moving distance of a probe. A counter counts the oscillator frequency of the oscillator. A computer calculates the moving distance. A display unit displays the moving distance computed by th... | 04/03/1990 |
| 4914610 | Displacement measuring apparatus When a probe of a displacement measuring apparatus is moved, a core member connected to the probe is also moved through coils of an oscillator. A movement distance of the probe is calculated in accordance with a change in an oscillation frequency generate... | 04/03/1990 |
| 4903335 | Power-saving type receiver A receiver includes a signal-receiving section for receiving input signals and outputting detection signal, and a power source for supplying power thereto. A first detector detects a preamble of each input signal while a second detector detects the end of... | 02/20/1990 |
| 4897857 | FSK demodulating device An FSK shift keying device includes a detector for detecting a transmission frame consisting of a preamble, data, and a postamble, a leading edge detector for detecting a leading edge of a voltage signal detected by the detector, a microprocessor for rece... | 01/30/1990 |
| 4896110 | Differential transformer for detecting the displacement of a probe using the combined output of two modes of operation In a length measuring apparatus, a measurement probe includes a core and is movable in an axial direction of the probe. First to third coils are arranged in an order in a moving area of the core in accordance with the movement of the probe. In the B-phase... | 01/23/1990 |
| 4886429 | Electromagnetic pump An electromagnetic pump comprising fluid operation chambers for discharging fluid to the outside; and electromagnet connected to an AC power source device for polarity switching for every half cycle of AC when energized; a permanent magent which moves tog... | 12/12/1989 |
| 4880034 | Fluid pressure regulating apparatus A fluid pressure regulating apparatus comprises a body having a fluid passage to be connected to a machine driven by a pressurized fluid and to a pressurized fluid supplying source. The rotation of a ring member on the outer surface of the body, around th... | 11/14/1989 |
| 4852264 | Distance measuring device with transmitter An oscillator oscillates at a frequency determined by the distance moved by a probe. The probe in contact with an object under measurement, moves according to the displacement of the object. A controller computes the distance moved by the probe from a ref... | 08/01/1989 |
| 4819921 | Vice A vice has a base fixed to the worktable of a machine, a slider slidable on the base and a fixing-releasing mechanism for selectively fixing the slider to the base and releasing the slider from the base. The fixing-releasing mechanism is provided with an ... | 04/11/1989 |
| 4773636 | Clamping apparatus A clamping apparatus comprises a clamping unit having a pair of clamping plates and clamping plate drive unit, and a fixing unit for fixing the clamping unit to an arbitrary position on a base frame. The clamping unit has a sub base to which one clamping ... | 09/27/1988 |
| 4693644 | Annular hole cutter An annular hole cutter including a barrel and cutting teeth attached to a lower portion of the barrel. A portion of a cutting edge of the cutting teeth including hard teeth each having an outer cutting edge formed into a segment which is concentric with r... | 09/15/1987 |
| 4619250 | Therapeutic appliance for improving functions of hand fingers A therapeutic appliance for improving the functions of an individual's carpal joints, hand and fingers includes a palm splint cloth shaped so as to accommodate a hand with its fingers spread apart. Finger retainer members are disposed on the front surface... | 10/28/1986 |
| 4596240 | Instruments for recovering functions of carpal joint, hand and fingers An instrument for recovering the functions of the carpal joint, the hand and the fingers including a ballonet operatively connected to an air supply for subjecting the ballonet to repeated expansion and contraction by feeding and discharging compressed ai... | 06/24/1986 |
| 4522197 | Gloves for recovering the functions of the carpal joint, the hand and the fingers Web-like triangular sacs are disposed between the finger stalls of a glove-shaped body to fan the respective fingers by feeding compressed air into the sacs. A plurality of sacs are arranged on the palm portion of the body, each running from the relative ... | 06/11/1985 |
| 4186733 | Pneumatic massage machine A massage machine has a massage head pneumatically driven for high frequency vibration and a liquid reservoir from which liquid, e.g. hair liquid, is forcibly discharged by simple finger action for dispersion through the massage head nose concurrently wit... | 02/05/1980 |
| 4032264 | Closed-type electromagnetic compressor In a closed-type compressor with an electromagnetic reciprocating drive, reliable and stable collimation of the electromagnetic driving part with the compressive pumping part is easily established by a snug engagement of fitting seats provided in the coup... | 06/28/1977 |
