Quotables
"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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 |
| 5437284 | System and method for in vivo calibration of a sensor Calibration apparatus and method for calibrating a movable pressure sensor include the use of a stop device to establish a reference position outside the sensing movement range of a first sensor. While in vitro, a reference pressure is established by appl... | 08/01/1995 |
| 5107847 | Fiber-optic transducer apparatus A fiber-optic transducer apparatus, and a related method of manufacturing it, for particular use in medical applications such as invasive blood pressure and body temperature measurement. The apparatus includes a catheter comprised of a sheath and an enclo... | 04/28/1992 |
| 5065010 | Fiber optic measurement system having a reference conductor for controlling the energy level of the light source A source fiber receives light from a light source and conducts the light through a catheter to transmit the light to a reflective surface at the catheter end. The reflective surface has a predetermined range of movement and forms a reflected beam from the... | 11/12/1991 |
| 5048524 | Blood parameter measurement A method and apparatus for measuring the oxygen saturation level and hematocrit of human blood in real time. A catheter having a notch in its tip is inserted into a blood vessel and guided to a desired location in the body of a patient. Bursts of light at... | 09/17/1991 |
| 4931049 | Catheter coupling system A catheter coupling system for connecting branch catheters to selected lumens of a multiple-lumen primary catheter. The system comprises a plurality of couplers each including a body having a primary passageway for receiving the primary catheter and a bra... | 06/05/1990 |
| 4903707 | Ventricular catheter assembly A catheter assembly comprising a catheter having a lumen and characterized by a flexible distal extremity. The assembly further comprises a bolt having a threaded distal extremity for threading into an opening in the skull in sterile relation. The bolt in... | 02/27/1990 |
| 4705047 | Output circuit for physiological measuring instruments An output circuit for a digital physiological measuring instrument. The output circuit provides means for a digital signal indicative of a physiological parameter to operate on an excitation signal from a monitor to provide a response signal for driving t... | 11/10/1987 |
| 4478224 | Artifact detector for heartbeat rate measuring system A heartbeat rate measuring system for monitoring a patient's EKG signal and estimating heartbeat rate. The system includes an artifact detection apparatus for filtering the EKG signal to detect the occurrence of a heartbeat artifact, and for inhibiting th... | 10/23/1984 |
| 4459993 | Continuity detector for heartbeat rate measuring system A continuity detection method and apparatus for use in a system for monitoring a patient's EKG signal and estimating heartbeat rate. The continuity detection apparatus continuously monitors continuity between two EKG electrodes contacting the patient and ... | 07/17/1984 |
| 4446715 | Transducer calibration system A transducer system that provides accurate measurements of a physical variable such as pressure for any one of a number of different transducers. Each transducer includes special calibration indicators for identifying any inaccuracies in its output signal... | 05/08/1984 |
| 4420000 | Method and apparatus for measuring heartbeat rate A heart rate monitoring apparatus and related method for detecting the successive beats of a heart and providing a reliable estimate of heartbeat rate. The apparatus measures the time intervals between the successive beats and averages a prescribed number... | 12/13/1983 |
