Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6138675 | Determination of the occurrence of an apnea Methods and apparatus for determining the occurrence of an apnea, patency and/or partial obstruction of the airway are disclosed. Respiratory air flow from a patient is measured to give an air flow signal. The determination of an apnea is performed by cal... | 10/31/2000 |
| 5326448 | Method for reducing the polarization of bioelectrical stimulation leads using surface enhancement, and product made thereby A method is disclosed for greatly reducing pacing polarization of a porous platinum bioelectrical stimulation electrode substrate by applying an oscillating current to the electrode substrate while it is immersed in an electrolyte such as a sodium sulfate... | 07/05/1994 |
| 5312445 | Implantable cardiac stimulating apparatus and method employing detection of P-waves from signals sensed in the ventricle A P-wave detector in a single chamber ventricular cardiac pacemaker, which is adapted to perform VDD pacing, senses natural atrial activity in the form of P-waves from a standard lead implanted in the ventricle of the heart. The P-wave detector is electri... | 05/17/1994 |
| 5304054 | Plasticizing sections of cold feed rubber extruders A Transfermix cold feed extruder having a plasticizing section that includes a plurality of screw flights therein in a transfer zone that is formed over a common length of the screw and barrel of the extruder. In the transfer zone, a helical groove in the... | 04/19/1994 |
| 5002512 | Apparatus for forming and controlling large-volume bubbles This apparatus for "Forming and Conrolling Large-Volume Bubbles" consists essentially of four elements: First, a bubble-forming loop made of a flexible, large-pore (substantially noncapillary) material able to store large quantities of bubble solution by ... | 03/26/1991 |
| 4836884 | Implantable materials Polymer hydrogels are adapted for surgical implants by chemical modification of the surface to stimulate the attachment and growth of cells thereto. The modification may be by oxidative acid etching or by copolymerization with methacrylic acid and diethyl... | 06/06/1989 |
| 4830181 | Wrist watch box A package for displaying or enclosing an article such as a wrist watch is provided. The package is in the form of a box which includes a base, an article holder slidably and removably positioned in the base and a cover adapted for alternate disposition wi... | 05/16/1989 |
| 4823240 | Audio-visual assembly for articles of clothing An audio-visual assembly for garments and a method for affixing the assembly thereto is provided. The assembly consists of light-emitting diodes electrically connected to an audio module so that the diodes blink in synchronism with the rhythm emitted by t... | 04/18/1989 |
| 4564015 | Garment with built-in interior support structure A ladies' top garment with a sewn-in support element to replace the conventional brassiere. In order to provide sufficient support for women wearing lightweight garments, such as a tank top, the invention provides a separate garment component attached to ... | 01/14/1986 |
| 4535018 | Composite decorative arrangement with dual adhesive characteristics A novelty decorative arrangement is provided by a composite separable combination of a stick-on element and an iron-on element, each such element being provided with a design. The arrangement includes a substrate formed of a semi-rigid material, such as c... | 08/13/1985 |
| 4453162 | Efficient and fast-switching telemetry transmitter A transmitter for a medical prosthesis which is highly efficient, and also permits rapid starting and stopping so that the same coil can be used for both transmission and reception without undue delays between the two modes of operation. During transmissi... | 06/05/1984 |
| 4453074 | Protection system for intelligent cards There is disclosed a protection system for intelligent cards. Each card has stored in it a code which is the encryption of a concatenation of a user secret password and a common reference text. The encryption is derived by an initialization terminal which... | 06/05/1984 |
| 4433765 | Spring clutches A spring clutch which has multiple springs disposed between two coaxially mounted cylindrical elements. The springs are designed to slip so that all of the springs are required to support the maximum load. During the onset of rotation, tabs at the ends of... | 02/28/1984 |
| 4414979 | Monitorable bone growth stimulator There is disclosed an implantable bone growth stimulator whose direct-current output can be monitored. Rather than to interrogate the device, e.g., by using a control magnet as in the heart pacer art, the device continuously transmits pulses of electromag... | 11/15/1983 |
| 4408608 | Implantable tissue-stimulating prosthesis There is disclosed an implantable tissue-stimulating prosthesis, such as a cochlear prosthesis, which can not only be implemented in single-chip form, but which also permits great flexibility in stimulation strategy and data transmission format. Only sixt... | 10/11/1983 |
| 4407289 | Externally-reset tachycardia control pacer An improved pacer for controlling tachycardia. Placing a magnet over the patient's chest results in the generation of two pulses, the time separation between which is an indication of the battery potential. Application of the magnet in this way also holds... | 10/04/1983 |
| 4407297 | Method and apparatus for performing non-invasive blood pressure and pulse rate measurements There is disclosed a blood pressure measuring instrument which utilizes a standard cuff, a bulb for manually pumping up the cuff pressure, and a bleed hole which allows the cuff pressure to decrease at the rate of a few mm Hg per second. A single pressure... | 10/04/1983 |
| 4399818 | Direct-coupled output stage for rapid-signal biological stimulator There is disclosed a direct-coupled output stage which is especially advantageous for use in an implantable heart pacer. In order to provide for charge balancing at the electrode/electrolyte interfaces, the electrodes are shorted to each other after a pac... | 08/23/1983 |
| 4398536 | Scanning burst tachycardia control pacer There is disclosed an improved pacer for controlling tachycardia. Following each tachycardia confirmation, a burst of a programmed number (e.g., 15) of stimulating pulses is generated. The rates of the bursts increase from cycle to cycle; thus following e... | 08/16/1983 |
| 4393874 | Bradycardia event counting and reporting pacer There is disclosed an event counting and reporting heart pacer which is useful for patients who suffer from bradycardia. The pacer operates in a demand mode with a 2.5-second escape interval. A count is maintained of the number of pauses each of which exc... | 07/19/1983 |
