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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7295629 | Data carrier having a controllable carrier-signal receiving-means configuration A data carrier (DC) has a receiving-means configuration (RC) which includes a switching means (S) and a first transmission coil (L1), which can be short-circuited with the aid of the switching means (S), and at least one second transmission coil (L2), ... | 11/13/2007 |
| 7207149 | Anchor and method for reinforcing a structure Anchor 10 for reinforcing a structure against displacement forces and a method of installation includes drilling a borehole 50 in an anchor medium 110 adjacent the structure A length of roving 21 composed of filaments 24 is doubled... | 04/24/2007 |
| 7191706 | Optically triggered fire set/detonator system The present invention is directed to a system having a plurality of capacitor discharge units (CDUs) that includes electrical bridge type detonators operatively coupled to respective explosives. A pulse charging circuit is adapted to provide a voltage for each respe... | 03/20/2007 |
| 6389975 | Transistorized high-voltage circuit suitable for initiating a detonator Disclosed, in a preferred embodiment, is a switching circuit incorporating a Field Effect Transistor (FET), two series dual-tap gas tube surge arrestors, and high-voltage resistors as part of a high voltage switch of a fireset for initiating an exploding ... | 05/21/2002 |
| 5585997 | Hydrogen thyratron modulator A single resonant DC charging circuit provides both the power and timing for the pedestal insertion is, likewise, controlled by a single trigger circuit input and by a saturable reactor which controls the firing of a thyratron switch.... | 12/17/1996 |
| 5454321 | Fault tolerant safe and arming device An electronic safe and arming device includes an enclosure (11) which has a circuit (16) for enabling a detonator (26). The circuit (16) has a sealed tube switch (17) which is pressurized with a gas mixture. The enclosure (11) is pressurized with substant... | 10/03/1995 |
| 4194202 | Grid pulsed oscillator and detector 5. A pulse doppler proximity fuze comprising a self-pulsing oscillator for eveloping a series of radio frequency electromagnetic energy impulses, an antenna electrically connected to said oscillator for radiating said impulses into space and for intercepti... | 03/18/1980 |
| 4140062 | Differential integrator 1. A differential integrator circuit comprising an input capacitance; means or applying an a-c input signal of varying amplitude between one terminal of said capacitance and circuit ground; first and second resistances each having one terminal connected to... | 02/20/1979 |
