A cardiac pacemaker (or artificial pacemaker, so as not to be confused with the natural pacemaker of the heart), is a medical device that generates electrical impulses delivered by electrodes to cause the heart muscle chambers (the upper, or atria and/or the lower, or ventricles) to contract and therefore pump blood; by doing so this device replaces and/or regulates the function of the electrical conduction system of the heart.
invented by Xerox PARC
The idea was first documented in a memo that Robert Metcalfe wrote.
invented by Fujio Masuoka
Flash memory (both NOR and NAND types) is invented in Japan by Fujio Masuoka…
invented by Konrad Zuse
The Z1 was a motor-driven mechanical computer designed by Konrad Zuse from 1936…
invented by John Ambrose Fleming
A vacuum tube, electron tube, valve (British usage), or tube (North America),…
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