Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 6784601 | Discharge lamp including heat releasing device and lamp device The present invention relates to a lamp device using a high-pressure vapor discharge lamp, particularly to an improvement for controlling the influence of the generation of heat, which accompanies an increase in lamp power and a reduction in the size of a reflector.... | 08/31/2004 |
| 4678958 | High pressure sodium vapor lamp with improved color reproduction index The invention relates to a high pressure sodium vapor lamp having improved color reproduction index, which has a discharge vessel (1) placed in an outer envelope (10) and at least a pair of electrodes (4,5) and a filling comprising of at least one additiv... | 07/07/1987 |
| 4503360 | Compact fluorescent lamp unit having segregated air-cooling means Convection air-cooling of a compact electric discharge lamp unit that is adapted for use as a screw-in energy-conserving substitute for an incandescent-type lamp bulb is enhanced by partitioning the lamp housing into two separate compartments and providin... | 03/05/1985 |
| 3956652 | Device on a metallic gas-discharge vessel for current lead-in through its wall Device on a metallic gas discharge vessel as a current lead-in through its wall. The inner conductor which traverses the container wall is supported by an insulating sleeve. For protection against the action of glow discharges protective gaps are located ... | 05/11/1976 |
