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Patents issued on Mar 10, 1981
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Check out Design Patents for Mar 10, 1981
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USRE30546
Function indication means for electric switches
- Mar 10, 1981
USRE30545
Catalyst
- Mar 10, 1981
USRE30543
Methanol foam fermentation to single cell protein by Pseudomonas methanica
- Mar 10, 1981
USRE30541
Thermoplastic splint or cast
- Mar 10, 1981
USRE30540
Heat storage water tank
- Mar 10, 1981
USRE30539
Soil cultivating implements
- Mar 10, 1981
US4255816
Receiving apparatus having a plurality of antennas
- Mar 10, 1981
US4255815
Electronic switching for AM-FM radio
- Mar 10, 1981
US4255814
Simulcast transmission system
- Mar 10, 1981
US4255813
Dicode transmission system
- Mar 10, 1981
US4255812
Signal regenerating apparatus with DC compensation
- Mar 10, 1981
US4255811
Key controlled block cipher cryptographic system
- Mar 10, 1981
US4255810
Jam resistant frequency modulation system
- Mar 10, 1981
US4255809
Dual redundant error detection system for counters
- Mar 10, 1981
US4255808
Hard or soft cell failure differentiator
- Mar 10, 1981
US4255807
Error testing of recording media such as magnetic tape
- Mar 10, 1981
US4255806
Display means for chronometers with electro-optical elements
- Mar 10, 1981
US4255805
Data introducing arrangement
- Mar 10, 1981
US4255804
Electronic watch
- Mar 10, 1981
US4255803
Electronic timepiece equipped with alarm function
- Mar 10, 1981
US4255802
Electronic timepiece
- Mar 10, 1981
US4255801
Electronic watch
- Mar 10, 1981
US4255800
Method and apparatus for locating underwater objects
- Mar 10, 1981
US4255799
Underwater-target direction-finding apparatus
- Mar 10, 1981
US4255798
Method and apparatus for acoustically investigating a casing and cement bond in a borehole
- Mar 10, 1981
US4255797
Sonic attenuation system
- Mar 10, 1981
US4255796
Associative information retrieval continuously guided by search status feedback
- Mar 10, 1981
US4255795
Programmable binary correlator
- Mar 10, 1981
US4255794
Digital filter
- Mar 10, 1981
US4255793
Apparatus for generating nonlinear pulse patterns
- Mar 10, 1981
US4255792
Automated analog circuit test system
- Mar 10, 1981
US4255791
Signal processing system
- Mar 10, 1981
US4255790
Programmable pulse generating system
- Mar 10, 1981
US4255789
Microprocessor-based electronic engine control system
- Mar 10, 1981
US4255788
Phasing detector for continuous flow systems
- Mar 10, 1981
US4255787
System and method for controlling the power generated by a system of hydro-plants and thermal units
- Mar 10, 1981
US4255786
Multi-way vectored interrupt capability
- Mar 10, 1981
US4255785
Microprocessor having instruction fetch and execution overlap
- Mar 10, 1981
US4255784
Transformer-rectifier apparatus
- Mar 10, 1981
US4255783
Selective commutation circuit for an inverter
- Mar 10, 1981
US4255782
Electrical energy conversion systems
- Mar 10, 1981
US4255781
Luminaire latch device
- Mar 10, 1981
US4255780
Illumination assembly for use with electrical terminal units
- Mar 10, 1981
US4255779
Package machine insertable rolled metallized film capacitor
- Mar 10, 1981
US4255778
Reference signal processor circuit
- Mar 10, 1981
US4255777
Electrostatic atomizing device
- Mar 10, 1981
US4255776
Apparatus for neutralizing electrostatic charges and for removing dust from various objects
- Mar 10, 1981
US4255775
Electrostatic precipitator rapper control system with enhanced accuracy
- Mar 10, 1981
US4255774
Static instantaneous overcurrent relay with low transient overreach
- Mar 10, 1981
US4255773
Ground fault interruptor
- Mar 10, 1981
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