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| Number | Title | Issue Date |
| 4944722 | Percutaneous axial flow blood pump The reliability and compactness of a percutaneously insertable intravascular axial flow blood pump are improved by connecting the pump's rotor and drive cable through a resiliently extendable rotor extension. The rotor extension and drive cable fitting ar... | 07/31/1990 |
| 4937839 | Frequency multiplexed full duplex 4800 bps modem 4800 B/S full duplex operation of a frequency-multiplexing modem over the switched telephone network without cancellation is made possible by combining 900-baud, 32-state operation with a combination of analog filtering and raised cosine digital filtering... | 06/26/1990 |
| 4908012 | Chronic ventricular assist system An implantable ventricular assist system uses a small high-speed axial flow blood pump which may be grafted into the patient's circulatory system. The pump includes a blood tube in which the pump rotor and stator are coaxially contained, and a motor stato... | 03/13/1990 |
| 4906229 | High-frequency transvalvular axisymmetric blood pump A high-frequency transvalvular blood pump for temporary cardiac assist provides suction to decompress the ventricular cavity during both systole and diastole. The intake end of the pump is connected to a cannula which is inserted into the ventricular cavi... | 03/06/1990 |
| 4895557 | Drive mechanism for powering intravascular blood pumps A disposable, sterilizable cable drive unit for an intravascular blood pump includes a rotor enclosed in a fluid-tight enclosure which can be slipped into the stator of a drive motor. The unit is connectable to a constant-rate purge fluid supply and to a ... | 01/23/1990 |
| 4880167 | Irrigation hose with linear turbulent flow emitter Turbulent-flow emitter channel sections are vacuum-formed in an extruded flat plastic strip. The strip is then applied to a hose substrate, and inlet and outlet openings are formed at opposite ends of the channel sections. The strip may be hot-melt bonded... | 11/14/1989 |
| 4869646 | Continuous peristaltic pump Substantially continuous fluid delivery in a variable-speed peristaltic pump is achieved by operating the pump at maximum speed through most of the deadband regardless of the delivery rate. Safety means are disclosed to monitor the correct operation of th... | 09/26/1989 |
| 4849836 | Copy protection for computer discs A copy protection system for computer discs in which a key sequence of 1101 in a copy protection section of the program is deliberately rendered ambiguous by repeatedly recording a word containing that sequence while gradually shifting the phase of the tr... | 07/18/1989 |
| 4846152 | Single-stage axial flow blood pump A miniature high-speed intravascular blood pump is formed as a single stage with two rows of rotor blades and a single row of stator blades within a tubular housing. The rotor's first row produces a mixed centrifugal and axial flow, while the rotor's seco... | 07/11/1989 |
| 4838682 | Ocular topology system Topological information of the cornea and anterior chamber of an eye is optically developed by projecting toward said eye a target image sharply focused in a movable flat plane. As the plane is moved through the eye, the reflection of the target is in foc... | 06/13/1989 |
| 4833718 | Compression of stored waveforms for artificial speech In a digital text-to-speech conversion system of the type usually contained in all-software form on a floppy disk, memory requirements for the storage of digitized waveform samples are reduced while speech quality is improved, by providing compression tec... | 05/23/1989 |
| 4828107 | Disposable container for syringes An in-room sharps container for hospital rooms and the like provides superior safety, versatility and economy by featuring a tapered, stackable body with a permanently hinged cover which is irreversibly interlockable with the body and which carries a semi... | 05/09/1989 |
| 4817586 | Percutaneous bloom pump with mixed-flow output The outside diameter of an intravascular axial flow blood pump is reduced without reducing the size of its journal bearings by causing the pumped blood stream to exit through apertures in the cylindrical outside wall of the pump housing between the rotor ... | 04/04/1989 |
| 4817155 | Method and apparatus for speech analysis Speech analysis is performed by synchronizing, with the initiation of glottal pulses produced during the voicing of phonemes, a pitch-independent transform that performs analysis entirely within a pitch period. Analysis is made of the three most dominant ... | 03/28/1989 |
| 4805220 | Conversionless digital speech production Clear speech can be produced on a DAC-less personal computer from an all-software speech-generating program with an unlimited vocabulary by applying to the computer's speaker a square-wave carrier signal of ultrasonic frequency, and varying the duty cycle... | 02/14/1989 |
| 4785799 | Method and apparatus for automatic profiled infusion in cyclic TPN Cyclic total parenteral nutrition is safely administered by tapering the infusion rate over a substantial period of time at the beginning and end of the infusion cycle. An infusion pump is disclosed which automatically calculates and performs a cycle prof... | 11/22/1988 |
| 4782997 | Mail delivery signal device An automatic signaling arm attachment for a standard rural mailbox with a beveled edge which can be wedged between the door and the sidewall of the mailbox to hold the signaling arm in a generally inconspicuous position alongside the mailbox when the door... | 11/08/1988 |
| 4779614 | Magnetically suspended rotor axial flow blood pump An implantable axial flow blood pump maximizes the blood flow while minimizing the dimensions of the pump. By magnetically suspending a rotor of relatively small diameter coaxially in a cylindrical blood conduit of substantially larger inner diameter, an ... | 10/25/1988 |
| 4770859 | Dispenser for chemicals A device for dispensing a caked composition into a liquid employs a container filled to a desired level with a cake of the composition to be dispensed, and an upwardly opening vessel over which to place the container telescopically so that the cake surfac... | 09/13/1988 |
| 4760277 | Computer backup power supply with keyboard lighting A system includes a power supply unit adapted to provide power from a separate backup source of power to a computer in the event of an interruption in a primary source of power, the unit having a size and shape adapted to be set on a support surface in a ... | 07/26/1988 |
| 4756706 | Centrally managed modular infusion pump system A plurality of infusion pump modules are detachably connected to a portable central management unit. The modules can be programmed by the central management unit, and their operating information displayed by the central management unit, when they are conn... | 07/12/1988 |
| 4754279 | Scan converter for radar In a scan converter for converting polar-coordinate radar data into a standard video display scanned at a 100 ns per pixel rate, the reading of sixteen x-y pixels into the video buffer, writing of two polar pixels into the x-y memory, and fading of four x... | 06/28/1988 |
| 4745279 | Hematocrit measuring apparatus The hematocrit of a volume of blood can be determined in real time without volume or flow rate limitations by sensing the diffusion of infrared light by the bloodstream. For this purpose, an infrared light beam is directed at a transparent cuvette through... | 05/17/1988 |
| 4742818 | Soakable eyepiece for endoscopes An eyepiece assembly for an endoscope focusable by an exterior focusing collar is made soakable by using an O ring and very fine screwthreads to prevent liquid sterilant from penetrating under the collar and entering the interior of the eyepiece. The use ... | 05/10/1988 |
| 4732140 | Vibratory massager retained against body with belt having elastic strap A vibratory massage device for use in conjunction with therapeutic exercises. The device has several belts of varying sizes, to which one or two vibrator units can be releasably attached for use on various body parts. An elastic band on each belt firmly p... | 03/22/1988 |
| 4733229 | Highlighting gray scale video display terminal In a CRT display of digitized gray scale information from a diagnostic scan, an operator-selectable area of the display can be highlighted to increase the contrast and brightness of a selected portion of the image while simultaneously viewing a wide range... | 03/22/1988 |
| 4731800 | Raised-cosine filtering for modems Filter quality is substantially improved (or complexity substantially reduced) in a digital PSK modem requiring an overall filter characteristic of the percent raised cosine type by using, in both the transmitter and the receiver, a filter having the same... | 03/15/1988 |
| 4709612 | Nut for stringed instruments A nut for stringed instruments which allows unimpeded movement of the strings within the grooves of the nut for accurate and stable tuning. The nut includes grooves which are flared outwardly and downwardly in the direction of the body of the instrument b... | 12/01/1987 |
| 4704121 | Anti-thrombogenic blood pump Thrombus formation in an implantable blood pump is prevented by using a close-tolerance purge seal for the impeller shaft or rotor. A blood-compatible fluid is used for the purge fluid (which is preferably also the bearing fluid), and the purge flow into ... | 11/03/1987 |
| 4700378 | Data base accessing system Inexpensive communication is provided between a data base and a plurality of subscribers each equipped with only a telephone and a TV set by using only tone signals to communicate from the subscribers to the data base, and data signals at least partially ... | 10/13/1987 |
| 4697577 | Scanning microtelescope for surgical applications Adjustment of the field-of-view angle in a surgical microtelescope from the outside of the patient's body is made possible by including in the objective optical system an assembly of mutually movable prisms. The prisms can be moved by a wire running along... | 10/06/1987 |
| 4694668 | Security box A device in which to place an article to be retrieved later by an intended recipient employs a container having a forward portion defining a first opening through which to insert an article, a rearward portion defining a second opening through which to re... | 09/22/1987 |
| 4692941 | Real-time text-to-speech conversion system A high-quality, real-time text-to-speech synthesizer system handles an unlimited vocabulary with a minimum of hardware by using a microcomputer-software-compatible time domain methodology which requires a minimum of memory and computational power. The sys... | 09/08/1987 |
| 4692145 | Power system for infusion pumps A safety system for battery-operated, microprocessor-controlled infusion pumps using separate primary and reserve batteries. When the primary battery nears exhaustion, the reserve battery is switched in and an interval timer is started, but the pump opera... | 09/08/1987 |
| 4681010 | Multidirectionally adjustable vibrato device A vibrato device for guitars which is easily omnidirectionally adjustable by a clamp screw and a pivot screw concentric therewith, both conveniently accessible from the rear of the device, and by elevation screws mounted in the string-supporting saddles a... | 07/21/1987 |
| 4680750 | Universal high-speed span line switch Malfunctions in an automatic span line switch due to resonances in high-speed span lines are avoided by interposing signal-free intervals whenever the switch causes a possible phase change to occur in the signal being supplied to the span, preventing the ... | 07/14/1987 |
| 4617645 | Compaction method for waveform storage The memory needed for the digital storage of a waveform having an amplitude range of &#b1;128 units is compacted by nearly 50% through the use of a 16-position table containing selected increments. Each waveform sample value is first predicted from at lea... | 10/14/1986 |
| 4612809 | Curved-array ultrasonic probe using low-velocity fluid A small, simple, yet accurate probe for producing a sector scan for ultrasonic medical diagnostic apparatus is provided by positioning a curved transducer array within the probe opposite a window, and filling the probe with a fluid having an acoustic velo... | 09/23/1986 |
| 4603574 | Blood pressure transducer tester Calibration testing of a blood pressure transducer can be performed in immediate proximity to the body of the patient by including in either the transducer housing or the housing of a connector located adjacent thereto, a pair of membrane switches on oppo... | 08/05/1986 |
| 4591702 | Digit manipulative data input key In devices such as electronic calculators, which perform mathematical or like functions and require plurality of data inputs to perform their functions; a data input key is pivotally maintained within the body of said device and is adapted to provide a pl... | 05/27/1986 |
