Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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 |
| 5275620 | Implantable lead connectors and remote lead assembly This invention describes novel lead connectors for use with an implantable device, such as a cardiac pacemaker. In one aspect, the connectors use resilient spring action to mechanically retain the lad in the connector and maintain reliable electrical cont... | 01/04/1994 |
| 5191884 | Reconfirmation prior to shock for implantable defibrillation A multiprogrammable, telemetric, implantable defibrillator contains a high energy shock system to revert VT/VF's to normal sinus rhythm and a multi-programmable VVI bradycardia support system. When the apparatus is in an automatic shock sequence, there ar... | 03/09/1993 |
| 4969462 | Pacemaker with improved automatic output regulation A pacemaker which is provided with an improved automatic regulation circuit which is capable of distinguishing between a fusion beat and loss of capture. The failure to sense an evoked potential following a stimulus may be due to either. The cause is dete... | 11/13/1990 |
| 4969460 | Pacemaker with improved automatic output regulation A pacemaker which is provided with an improved automatic regulation circuit which is capable of distinguishing between a fusion beat and loss of capture. The failure to sense an evoked potential following a stimulus may be due to either. The cause is dete... | 11/13/1990 |
| 4969464 | Pacemaker with improved automatic output regulation A pacemaker which is provided with an improved automatic regulation circuit which is capable of distinguishing between a fusion beat and loss of capture. The failure to sense an evoked potential following a stimulus may be due to either. The cause is dete... | 11/13/1990 |
| 4969467 | Pacemaker with improved automatic output regulation A pacemaker which is provided with an improved automatic regulation circuit which is capable of distinguishing between a fashion beat and loss of capture. The failure to sense an evoked potential following a stimulus may be due to either. The cause is det... | 11/13/1990 |
| 4969461 | Pacemaker with improved automatic output regulation A pacemaker which is provided with an improved automatic regulation circuit which is capable of distinguishing between a fusion beat and loss of capture. The failure to sense an evoked potential following a stimulus may be due to either. The cause is dete... | 11/13/1990 |
| 4960123 | Differentiating between arrhythmia and noise in an arrhythmia control system A method and apparatus for differentiating between arrhythmia and noise in an antiarrhythmia device. A noise detection criteria is applied to a detected signal so as to detect noise simultaneously at two different sensitivity levels. When noise is not det... | 10/02/1990 |
| 4942876 | Pacemaker terminal apparatus A pacemaker terminal for connecting an electrode lead having a proximal end includes a first section fixed to the pacemaker and a second section moveably engaged with the first section. A spring element is interposed between the first and second sections ... | 07/24/1990 |
| 4940054 | Apparatus and method for controlling multiple sensitivities in arrhythmia control system including post therapy packing delay An apparatus and method for tachyarrhythmia reversion uses multiple sensitivities programmed for automatic operation. A first (medium) sensitivity is used normally for the detection of sinus rhythm and ventricular tachycardia. A second (higher) sensitivit... | 07/10/1990 |
| 4903700 | Pacing pulse compensation A pacemaker which generates a triphasic stimulus; the first and third phases are positive pulses, and the second is the negative stimulus. After-potentials are so low that reliable sensing of evoked signals are possible. The rapidity of the charge balanci... | 02/27/1990 |
| 4901725 | Minute volume rate-responsive pacemaker A rate-responsive pacemaker whose rate control parameter is minute volume derived over a bipolar lead. An algorithm based on averaged samples and zero crossings provides enhanced accuracy. Sustained exercise at high pacing rates is possible.... | 02/20/1990 |
| 4901726 | Rate-responsive, distributed-rate pacemaker A rate-responsive heart pacer in which rate-control parameter (RCP) values are arranged in a percentile ranking and mapped onto a percentile ranking of a desired rate distribution. By monitoring the RCP values over an extended time interval and developing... | 02/20/1990 |
| 4895152 | System for cardiac pacing A system is provided for cardiac pacing, in which the output levels of the electrical stimulus pulses are responsive to the detection or non-detection of cardiac pacer evoked potentials. A pulse generator is provided for emitting electrical stimulus pulse... | 01/23/1990 |
| 4895151 | Apparatus and method for therapy adjustment in implantable Apparatus and method for treating tachyarrhythmias wherein the presence of a patient tachyarrhythmia is detected and a first antitachyarrhythmia therapy (antitachycardia pacing) is given at a first energy level. The haemodynamic condition of the patient i... | 01/23/1990 |
| 4878497 | Pacemaker with improved automatic output regulation A pacemaker which is provided with an improved automatic regulation circuit which is capable of distinguishing between a fusion beat and loss of capture. The failure to sense an evoked potential following a stimulus may be due to either. The cause is dete... | 11/07/1989 |
| 4856522 | Rate-responsive, distributed-rate pacemaker A rate-responsive heart pacer in which rate-control parameter (RCP) values are arranged in a percentile ranking and mapped into a percentile ranking of a desired rate distribution. By monitoring the RCP values over an extended time interval and developing... | 08/15/1989 |
| 4821724 | Pacing pulse compensation A pacemaker which generates a triphasic stimulus; the first and third phases are positive pulses, and the second is the negative stimulus. After-potentials are so low that reliable sensing of evoked signals are possible. The rapidity of the charge balanci... | 04/18/1989 |
| 4798206 | Implanted medical system including a self-powered sensing system Self-contained, self-powered, flexible electrical control signal generating means are located in the right ventricle of a heart and generate electrical control signals solely by mechanical movements caused by actions of and conditions in the heart without... | 01/17/1989 |
| 4796643 | Medical electrode leads An electrode lead for a pacemaker which has improved introducing, removal and anchoring characteristics. An insulating covering has at least two rows of loops which fall within a truncated cone with its minimum diameter at the tip.... | 01/10/1989 |
| 4779617 | Pacemaker noise rejection system A noise rejection circuit for an implantable pacemaker. During re-triggerable relative refractory periods following a heartbeat, the peak noise level is sensed; the relative refractory period is re-started whenever the input signal exceeds the previous pe... | 10/25/1988 |
| 4774953 | Self-supporting terminal for implantable pulse generator and method of manufacturing the same A terminal for an implantable pulse generator for connecting an electrode lead to the generator includes a base section formed of partially stabilized zirconia (PSZ) mounted on the exterior of the pulse generator housing and a conductive terminal member c... | 10/04/1988 |
| 4716903 | Storage in a pacemaker memory An implantable pacemaker which stores in memory the representation of an ECG signal by compressing the data. Whenever the input signal changes by a threshold amount from the last time data was recorded, a representation of the time interval which has elap... | 01/05/1988 |
| 4716887 | Apparatus and method for adjusting heart/pacer rate relative to cardiac pCO2 to obtain a required cardiac output The apparatus for pacing a heart in accordance with the heart rate needed to produce a required cardiac output relative to the partial pressure of carbon dioxide in the blood, pCO2, while the person is exercising comprises a pacer adapted to be... | 01/05/1988 |
| 4715380 | Capped pacer neck containing a connector assembly The cardiac pacing system comprises a cardiac pacer, and a multiconductor pacing lead having a distal end and a proximal end having a plurality of spaced apart ring electrodes thereon. The pacer comprises a metal case mounting electronic/electrical circui... | 12/29/1987 |
| 4708144 | Automatic sensitivity control for a pacemaker An implantable pacemaker in which the sensitivity is automatically controlled. The peak value of each R wave is measured, and a long-term average is derived. The gain of the sense channel is adjusted automatically in accordance with the average of the mea... | 11/24/1987 |
| 4706681 | Cardiac ultrasonically marked leads and method for used same Cardiac ultrasonically marked leads produced by mounting one or more piezoelectric marker transducers into the leads and connecting the transducers by electrical conductors to appropriate electronic circuits which, upon reception of the scanner ultrasonic... | 11/17/1987 |
| 4702253 | Metabolic-demand pacemaker and method of using the same to determine minute volume A metabolic-demand pacemaker in which the standby rate is a function of minute volume. Electrodes are placed in a blood vessel in the vicinity of the patient's pleural cavity, a known current field is established in the blood, and the impedance in the fie... | 10/27/1987 |
| 4697595 | Ultrasonically marked cardiac catheters The hollow cylindrical wall of the catheter is composed of flexible, electrically insulating, ultrasonically transparent material. Embedded therein are spaced tubular-shaped ultrasonic piezoelectric transducers which substantially surround the lumen. The ... | 10/06/1987 |
| 4692719 | Combined pacemaker delta modulator and bandpass filter A combined pacemaker delta modulator and bandpass filter which requires only one active device. The sense signal is applied through a conventional delta modulator capacitor to the minus input of a differential amplifier, and the conventional current sourc... | 09/08/1987 |
| 4611127 | Electronic sensor for static magnetic field A magnetic field sensor including a resonant circuit having a coil. The resonant frequency varies with the strength of the magnetic field which passes through the coil. The resonant circuit is energized for approximately one-half cycle of the resonant fre... | 09/09/1986 |
| 4606350 | Pacemaker battery impedance test circuit and method of operation A circuit for measuring the internal impedance of the cell of a heart pacer in order that the remaining life of the cell can be estimated. The test is performed by cutting off all current flow from the cell to the pacer circuitry, the pacer still being po... | 08/19/1986 |
| 4587970 | Tachycardia reversion pacer There is disclosed a tachycardia control pacer in which there is generated a sequence of pacing pulses at intervals which are a function of the effective refractory period intrinsically associated with the rate of the patient heartbeats. If the tachycardi... | 05/13/1986 |
