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Browse by Date |
| Patent Number |
Title Of Patent |
Date Issued |
| 4297677 |
Personal ambient sound referenced annunciator |
Oct. 27, 1981 |
| 4297676 |
Mark signal amplifier |
Oct. 27, 1981 |
| 4297675 |
Supplemental right turn signal for semitrailers |
Oct. 27, 1981 |
| 4297674 |
Passive security device |
Oct. 27, 1981 |
| 4297673 |
Omnidirectional speed cockpit display |
Oct. 27, 1981 |
| 4297672 |
Early warning system for approaching transportation vehicles |
Oct. 27, 1981 |
| 4297671 |
Tandem insert molded electrical controls and process for producing same |
Oct. 27, 1981 |
| 4297670 |
Metal foil resistor |
Oct. 27, 1981 |
| 4297669 |
Thermal cut-outs and to the method of assembling a multiplicity of such thermal cut-outs |
Oct. 27, 1981 |
| 4297668 |
Thermostat with bracket for attachment to a tubular member |
Oct. 27, 1981 |
| 4297667 |
Fusible electric cable protector |
Oct. 27, 1981 |
| 4297666 |
Slow-blowing fuse using zinc-manganese alloy link |
Oct. 27, 1981 |
| 4297665 |
Doughnut-type transformer for resistance butt welding |
Oct. 27, 1981 |
| 4297664 |
Electromagnetic overcurrent tripping device with adjustable armature air gap |
Oct. 27, 1981 |
| 4297663 |
Circuit breaker accessories packaged in a standardized molded case |
Oct. 27, 1981 |
| 4297662 |
Gas-tight-high-frequency permeable window arrangement in a coaxial line, particularly for travel... |
Oct. 27, 1981 |
| 4297661 |
Ferrite substrate microwave filter |
Oct. 27, 1981 |
| 4297660 |
Electric circuit using surface acoustic wave device |
Oct. 27, 1981 |
| 4297659 |
Crystal filter structure |
Oct. 27, 1981 |
| 4297658 |
3dB Waveguide directional coupler |
Oct. 27, 1981 |
| 4297657 |
Closed loop temperature compensated frequency reference |
Oct. 27, 1981 |
| 4297656 |
Plural frequency oscillator employing multiple fiber-optic delay line |
Oct. 27, 1981 |
| 4297655 |
Temperature compensated crystal oscillator |
Oct. 27, 1981 |
| 4297654 |
Crystal oscillator including a MOS-capacitor |
Oct. 27, 1981 |
| 4297653 |
Hybrid semiconductor laser/detectors |
Oct. 27, 1981 |
| 4297652 |
Injection-type semiconductor laser |
Oct. 27, 1981 |
| 4297651 |
Methods for simultaneous suppression of laser pulsations and continuous monitoring of output pow... |
Oct. 27, 1981 |
| 4297650 |
Phase locked loop carrier recovery circuit with false lock prevention |
Oct. 27, 1981 |
| 4297649 |
Malfunction detector for a group of cyclically interconnected phase-locked oscillators |
Oct. 27, 1981 |
| 4297648 |
Microwave frequency division by phase locked loops |
Oct. 27, 1981 |
| 4297647 |
Hybrid integrated circuit and a method for producing the same |
Oct. 27, 1981 |
| 4297646 |
Current mirror circuit |
Oct. 27, 1981 |
| 4297645 |
Automatic gain control circuit comprising a circuit for comparing a modulated signal with an env... |
Oct. 27, 1981 |
| 4297644 |
Amplifier with cross-over current control |
Oct. 27, 1981 |
| 4297643 |
Noise obviating electronic signal coupling means |
Oct. 27, 1981 |
| 4297642 |
Offset correction in operational amplifiers |
Oct. 27, 1981 |
| 4297641 |
Serrodyning system employing an adjustable phase shifting circuit |
Oct. 27, 1981 |
| 4297640 |
Apparatus for measuring the electric charge condition of non-conductive particles in a mildly co... |
Oct. 27, 1981 |
| 4297639 |
Battery testing apparatus with overload protective means |
Oct. 27, 1981 |
| 4297638 |
X-ray system signal derivation circuits for heat unit indicators and/or calibration meters |
Oct. 27, 1981 |
| 4297637 |
Method and apparatus for mapping lines of nuclear density within an object using nuclear magneti... |
Oct. 27, 1981 |
| 4297636 |
Magnet and probe mounting means on a rotating head of magnetic defect testing apparatus |
Oct. 27, 1981 |
| 4297635 |
Watthour meter and battery retaining apparatus therefor |
Oct. 27, 1981 |
| 4297634 |
Device for measuring the amount of movement of a straightly moving object |
Oct. 27, 1981 |
| 4297633 |
Electric fence monitoring system with energizer, responder and receiver |
Oct. 27, 1981 |
| 4297632 |
Device for monitoring lamp failure in airport navigation lighting |
Oct. 27, 1981 |
| 4297631 |
Battery charging systems for road vehicles |
Oct. 27, 1981 |
| 4297630 |
Timed fast charger |
Oct. 27, 1981 |
| 4297629 |
Automatic switching arrangement for two batteries which are charged in parallel and discharged i... |
Oct. 27, 1981 |
| 4297628 |
Energy economizer for induction motors |
Oct. 27, 1981 |
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