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Trio Engineering Inc. Patents |
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Assignee: Trio Engineering Inc.
Address: Nepean, CA
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4821154 |
Multi-bulb light source |
April 11, 1989 |
| A light source for use in traffic signals has a plurality of light bulbs, in which each bulb is used in turn until it burns out, at which time power is switched to an operable bulb. By means of lenses and mirrors in the light source, a substantially identical pattern of light rays is pro |
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