Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 4181130 | Drop discriminator system An electronic method and apparatus for evaluation of the quality of drop detection in apparatus for parenteral administration of medical fluids, wherein the waveforms of electrical signals representing drop flow detection are evaluated for conformity with... | 01/01/1980 |
| 4173224 | Automated intravenous fluid regulating and administering apparatus Automated dispensing apparatus is disclosed for administering intravenous fluid to a patient at a controlled volumetric rate such that deviations from the desired fluid volumetric flow rate are automatically corrected. In accordance with the invention, th... | 11/06/1979 |
| 4137915 | Flow control for an intravenous feeding system The flow control hereof is applied to a known system of feeding a patient intravenously and contemplates the use of a clamp applied externally to the delivery tube extending from the intravenous bag, bottle or other appropriate container to the patient, s... | 02/06/1979 |
| 4137940 | Liquid flow control apparatus There is disclosed liquid flow control apparatus (particularly for use where the flow takes place in the form of drops over at least part of the flow path). A valve in the flow path is controlled by a servo system in dependence on the difference between d... | 02/06/1979 |
| 4117843 | Surgical operating system with upper pressure limit A system for controlling the infusion of fluid to an operating field at a selected predetermined pressure, as a counterpart to an instrument for severing material of an object in the field, and for evacuating through a passage the severed material from th... | 10/03/1978 |
| 4105028 | Positive control intravenous fluid administration A method and apparatus for parenteral administration of medical fluids has a normally closed clamp on the intraveneous feeding tube which is opened by means of an electromagnetic actuator at a preselected drop frequency rate and closed when a drop is dete... | 08/08/1978 |
| 4098274 | Digital memory with power outage and memory overload logic in a dialysis system There is disclosed herein a blood pressure alarm system for use in a dialysis machine whereby alarms may be activated, and a blood pump deactivated if the actual blood pressure increases above or decreases below predetermined levels. The levels are determ... | 07/04/1978 |
| 4094318 | Electronic control means for a plurality of intravenous infusion sets Electronic control apparatus for controlling the administration of a plurality of separate fluids independently and consecutively, includes electrical circuitry connected with a plurality of valve operators to operate valves in a plurality of sets to cont... | 06/13/1978 |
| 4052987 | Automatic aspiration apparatus Apparatus is disclosed for aspiration of the operative site during open site surgery having automatic controls for responsively venting the aspiration system to atmosphere under certain conditions and for overriding the venting as desired comprising a con... | 10/11/1977 |
| 4038981 | Electronically controlled intravenous infusion set An electronically controlled, gravity-feed, intravenous infusion set in which a length of intravenous tubing is connected with a drip chamber to convey a fluid to be administered intravenously, the improvement comprising a normally closed internal valve i... | 08/02/1977 |
| 4038982 | Electrically controlled intravenous infusion set An electronically controlled intravenous infusion set of the gravity feed type having a flow path including a drip chamber and an internal valve for regulating flow through the set. Electromagnetic valve operating structure, positioned outside the IV set,... | 08/02/1977 |
| 4037598 | Method and apparatus for fluid flow control A digital system wherein a wide variety of different electromechanical output control devices, e.g., stepping motor pump or solenoid actuated I.V. tube pincher, is driven by electrical output pulses of varible frequency and pulse width from a digital puls... | 07/26/1977 |
| 4018362 | Automatic control for liquid flow Automatic regulation system of a flow of liquid, which system comprises an electronic liquid flow control circuit connected to a liquid flow regulation device which it actuates, the said electronic circuit being characterized in that it comprises a drop c... | 04/19/1977 |
| 4007742 | Surgical system for controlling the infusion of fluid to and the evacuation of fluid and material from an operating field A system for controlling the infusion of fluid to an operating field at a selected predetermined pressure, as a counterpart to an instrument for severing material from an object in the field, and for evacuating the severed material from the field in a sus... | 02/15/1977 |
| 4001801 | Automatic low throughput metering apparatus for selecting and controlling the flow rate of liquids An automatic metering apparatus for selecting and controlling the flow rate of liquids, particularly for medical purposes, to be arranged between a liquid feeding container and a perfusion or transfusion line, comprises an electronic timer device capable ... | 01/04/1977 |
| 3990443 | Drop rate sensing and regulating apparatus An apparatus, for example, an intravenous drop-feed apparatus for sensing the rate at which liquid drops fall along a predetermined vertical path and for regulating this drop rate to be substantially equal to a preselected drop rate includes a disposable ... | 11/09/1976 |
| 3986956 | Artificial kidney device An artificial kidney device is provided with a dialyzer for separating specified components from blood. A double walled tube is mounted midway of a tube provided for transporting the blood passed through the dialyzer into a vein of a human being, so as to... | 10/19/1976 |
