Did You Know...
...that the Band-Aid Bandage was invented by a Johnson & Johnson employee whose wife had cut herself? Earl Dickson's wife was rather accident prone, so he set out to develop a bandage that she could apply without help. He placed a small piece of gauze in the center of a small piece of surgical tape, and what we know today as the Band Aid bandage was born!
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| Number | Title | Issue Date |
| 5261123 | AM radio transmitter with a final stage tetrode In the case of a high power AM radio transmitter with a tetrode as final stage tube (13), this final stage tube (13) is designed as a low voltage tetrode with a d.c. plate voltage 80%. By utilizing these measures, a comp... | 11/09/1993 |
| 4656440 | Single-sideband modulator and broadcast transmitter A broadcast transmitter with single-sideband modulation for transmitting a message with a band width and carrier power which is lower in comparison with double-sideband modulation. To be able to operate a high-power single-sideband transmitter with only o... | 04/07/1987 |
| 4335363 | Amplitude modulator using a carrier tube and a peaking tube An amplitude modulator in which a radio frequency amplifier is arranged to produce a high power amplitude modulated radio frequency signal in a particularly efficient manner. The amplifier inlcudes two tetrode tubes, one of which is arranged to conduct co... | 06/15/1982 |
| 4319204 | Phase modulated square wave generator A pair of square waves of a carrier frequency are applied respectively to a pair of amplifier circuits having a common output circuit. The output circuit is connected so that the energy therein is dependent upon the relative phases of the square waves. A ... | 03/09/1982 |
| 4257122 | Apparatus for improving the efficiency of the modulation stage of a transmitter The efficiency of the transmitter modulator stage of the type in which an anode current Ia of the modulator tube varies as a function of the grid voltage Ug in accordance with the expression Ia =k.multidot.Ug | 03/17/1981 |
| 4118677 | Pulse width modulating circuit A modulator includes an output tank circuit energized from a d.c. source through a switching tube and a coupling circuit. The grid of the switching tube is driven by signal-modulated variable width rectangular pulses. The resulting output pulses from the ... | 10/03/1978 |
