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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 6782298 | Electronics for a shock hardened data recorder Electronics for a shock-hardened device, in particular a data recorder, incorporating non-volatile memory. The device has the functional elements: a signal conditioning circuit, an oscillator, an analog-to-digital converter (ADC), a field programmable gate array (FP... | 08/24/2004 |
| 6029120 | Bow-mounted chronograph A instrument and method for measuring archery tackle performance is disclosed. A low power, electronics measurement unit attached onto or mounted internal to a bow in communication with a sensor which detects a signal from an external trigger mechanism mo... | 02/22/2000 |
| 4372192 | First motion detector An electromagnet sensing device which detects the first axial motion of a ssile relative to its launcher to provide timing information and indicate when the missile first moves axially.... | 02/08/1983 |
| 4290219 | Target sight recording apparatus A rifle having a telescopic sight has apparatus for recording the target as seen through the telescopic sight at the instant the trigger is pulled. The apparatus includes a beam splitter for directing to a camera some of the light passing through the tele... | 09/22/1981 |
| 4129829 | Chronograph An apparatus for measuring velocity of a bullet is shown. A portable clamping device securely holds the barrel of a gun in position during firing. A bullet fired from the gun is projected through two openings located a predetermined distance apart from th... | 12/12/1978 |
| 4001961 | Round counter An electrochemical elapsed time meter indicator with round counter circui for a gun to indicate past usage whereby maintenance and repair or replacement procedures will insure greater reliability in critical field use. The meter, working on an electropla... | 01/11/1977 |
| 3936839 | Method and system for monitoring the light output of pyrotechnic luminants under dynamic conditions The light output of pyrotechnic luminants under dynamic conditions can be nitored to obtain data representative of ground surface illumination as a function of time and position of the illumination source. An array of photocells is disposed at substantial... | 02/03/1976 |
