Did You Know...
...In 1790, the cost to obtain a patent was between $4 and $5.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4196433 | Doppler frequency proximity fuze 1. An apparatus for preselecting the Doppler frequency response of a proxty fuze comprising, in combination, radar means for determining the relative velocity between a selected target and a proximity fuze and for developing a predetermined control curre... | 04/01/1980 |
| 4194204 | High resolution microwave seeker An active microwave seeker for missile guidance against ships or permanent and targets. Frequency agility and pulse time compression are employed as means to provide a capability for tracking small targets in heavy sea clutter, to reduce target angular sci... | 03/18/1980 |
| 4172255 | HF coastal current mapping radar system A system for radar remote sensing of near surface ocean currents in coastal regions. The system employs a pair of low power, transportable high frequency radar units to scatter signals from the shore off to the ocean waves. Underlying surface currents imp... | 10/23/1979 |
| 4167735 | Aircraft orientation determining means A system for measuring, in conjunction with a GCA radar, the crab angle of n aircraft which is making its landing approach above a runway just prior to touch-down. Two doppler radars are placed, one on each side of the runway at equal spacings from the cen... | 09/11/1979 |
| 4151526 | Obstacle detecting radar apparatus for a motor vehicle or the like A vehicle mounted obstacle detecting radar is disclosed. An electromagnetic wave radiated from the radar apparatus is received by a first antenna mounted on the ground and passed through a transmission line to a second antenna mounted on the ground and ra... | 04/24/1979 |
| 4106018 | Method and apparatus for reducing interference between plural radio altimeters A method and apparatus for independently controlling a CWFM radio altimeter to reduce interference from another nearby altimeter employs a high-Q filter outside the bandpass of the signals which are developed and decoded for altitude indication to detect ... | 08/08/1978 |
| 4010468 | Methods and apparatus for eliminating interference in radar systems Interference between two or more radar systems operating on the same freqcy is eliminated by synchronizing the rotation of the scanning antennas. In another embodiment, each transmitter is blanked if the corresponding receiver detects an interfering sign... | 03/01/1977 |
| 3978481 | Anti-collision vehicular radar system A radar system mounted on a vehicle and having an RF signal transmitted preferably in a confined beam in front of the vehicle and reflected from obstacles in the path of the beam to be reflected back to the vehicle. The system includes an asymmetrical mag... | 08/31/1976 |
