Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 4337661 | Equipment for ultrasonic examination In an ultrasonic scanner, a plurality of sound transducers are operable to project sound beams defining spaced sound paths into a sectional plane of an object and to receive echoes therefrom. The sound paths may be oscillatingly swept in the sectional pla... | 07/06/1982 |
| 4233989 | Echocardiographic apparatus for myocardial disease diagnosis by A-wave quantification A-wave quantification indicator automatically measures the difference in amplitude between the peak of the E-wave portion of an ultrasonically derived M-wave CRT display and the peak of the A wave portion of the M-wave. This difference in amplitude, which... | 11/18/1980 |
| 4187857 | Ultrasonic wave diagnostic apparatus to concurrently display an echo signal and a reference signal A signal, which is the sum of an ultrasonic wave echo signal and a group of PPM (pulse-position-modulated) pulses representative of a reference signal, is applied to a cathode ray tube (CRT) and is swept along one axis by a first sweeping signal with a fi... | 02/12/1980 |
| 4176658 | Ultrasonic echogram display A method of displaying information obtained by pulse-echo ultrasonic examination of an object, particularly in medical diagnostic examination, comprises forming a first display representing the positions of acoustic impedance discontinuities within the ob... | 12/04/1979 |
| 4156304 | Biomedical ultrasonoscope The combination of a "C" mode scan electronics in a portable, battery powered biomedical ultrasonoscope having "A" and "M" mode scan electronics, the latter including a clock generator for generating clock pulses, a cathode ray tube having X, Y and Z axis... | 05/29/1979 |
| 4008713 | Ultrasonic diagnostic technique utilizing switched gain signal processing An ultrasonic diagnostic technique utilized to determine the wall thickness of cardiac structures. In a preferred embodiment, the endocardial and epicardial surfaces of the left ventricular posterior wall are irradiated with an ultrasonic sound beam. The ... | 02/22/1977 |
