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Attorney: Weissenberger and Peterson


Number of patents: 20
Last date: February 16, 1988

NumberTitleIssue Date
4726029Error-correcting modem
Error multiplication in the differential decoder and descrambler of V.22 bis modems is avoided by replacing the differential coding with forward error correction and single symbol coding. The error syndrome bit of the error corrector is used in establishi...
02/16/1988
4651741Method and apparatus for determining oxygen saturation in vivo
Accurate in vivo measurement of blood oxygen saturation by fiberoptical means is made possible throughout a wide range of hematocrit or total hemoglobin values by using a single R/IR ratio I and calculating the SO2 value therefrom through the u...
03/24/1987
4641658Cardiac flow monitor
Previously undesired artifacts in a color signal used in fiberoptic cardiac catheters to measure blood oxygenation levels are used to produce indications of blood flow and true pulse. For this purpose, the color signal is band-pass filtered to derive a DC...
02/10/1987
4640819Stress crack reduction in polycarbonate parts
Stress cracking of polycarbonate parts during prolonged storage while assembled with plasticized polyvinyl tubing is greatly reduced by using tubing in which tri-2-ethylhexyl trimellitate is the predominant or sole primary plasticizer....
02/03/1987
4632107High-frequency jet ventilator
An opposing vortex oscillator is used to control the frequency and duty cycle of a high-frequency jet ventilator for trauma management in acute and uncontrolled situations where no power other than the pressure of the ventilation gas itself is available. ...
12/30/1986
4627839Patient controlled analgesia conversion
A removable cover for converting a programmable infusion pump into a patient-controlled analgesia (PCA) device. The cover can be placed onto an infusion pump and electrically connected thereto when open. The cover includes an internal switch which allows ...
12/09/1986
4625712High-capacity intravascular blood pump utilizing percutaneous access
Full-flow cardiac assist is provided for cardiogenic shock patients without major surgery by a miniature axial-flow pump which can be inserted into the heart through the femoral artery and driven via a flexible cable from an external power source. The cab...
12/02/1986
4597649Information display apparatus for ophthalmic slit lamps
A slit lamp with surgical laser capability includes an x-y table. An optical micrometer, readily retrofittable onto existing slit lamps, is mounted on the x-y table to measure table displacement in the y direction. The measuring electronics are resettable...
07/01/1986
4589287Strain gauge for medical pressure measurements
A disposable strain gauge pressure sensor providing reliable electrical isolation even at defibrillation voltages in the measurement of biological fluid pressures is produced by floatingly mounting a glass plate on a closed cell, fluid-impervious foam pad...
05/20/1986
4585142High-capacity food warmer cover
A food warmer cover is equipped with an inclined door which forms an effective seal against a pair of shoulders formed in the enclosure of the cover. The door pivots about the tops of the shoulders and slides horizontally into the enclosure to make room f...
04/29/1986
4573976Shielded needle
An apparatus for injecting a substance into a human or animal comprising a body adapted to have the substance to be injected pass therethrough, a needle mounted on the body and a needle guard mounted on the body between an extended position in which the g...
03/04/1986
4525096Connecting clamp for builder's scaffolding
A connector for use in builder's scaffolding systems for connecting crossmembers to upright members where the upright members have sockets provided thereon and each of the sockets has an internal clamping face. The connector is coupled to one end of the c...
06/25/1985
4522391Exercising device
A device to allow a person to bend forward and place the upper portion of his body above the pelvic region in an inverted position across a padded support placed in a doorway, while stretching his legs out and away from the padded cylinder in a direction ...
06/11/1985
4505156Method and apparatus for switching multi-element transducer arrays
A simple, versatile switching system for ultrasonic transducer arrays uses in-probe concentration and a crosspoint switching matrix, both under the control of a microprocessor in the control unit. The number of crosspoints is kept to a minimum by connecti...
03/19/1985
4469955Float with means for compensating for tide height differences
A float having depending fins and a curved surface on which waves impinge. The float provides an additional lift over and beyond its buoyancy. The float is coupled through a swivel to allow it to turn into the direction of waves. The float is additionally...
09/04/1984
4451917Method and apparatus for pulse train synchronization in PCM transceivers
A method and device for phase synchronization for use particularly where a fixed internal clock signal generator is used for both receive and transmit functions. The phase difference between the incoming pulse train and a fixed internal framing clock is d...
05/29/1984
4424421Apparatus for testing subscriber carrier systems
A telephone subscriber testing system is disclosed in which all tests may be performed from a central office. A central office test device is connected to the central office by a separate telephone line with a telephone number of its own. Moreover, a dedi...
01/03/1984
4379235Wave action generator
A wave motion motor is disclosed with an impeller moved by a float. The float is coupled to a swivel arrangement to turn in the direction of wave current and has an inclined underside. Also disclosed are means to adjust to tide level and triangular coupli...
04/05/1983
4368124Method of winding a mass transfer device and product
A mass transfer device of the type used, e.g., for blood dialysis is made by winding on a mandrel a series of fiber strands, each of which consists of a solid fiber and one or more hollow fibers, the solid fiber being at least as large, and preferably sub...
01/11/1983
4345395Method and apparatus for producing day-night pictures
A day-night picture achieves a realistic reproduction of the twinkling of distant city lights or the like, by backlighting small apertures in the picture with a fine, randomly moving reflection pattern obtained by suspending pieces of crumpled reflective ...
08/24/1982
 
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