Texas Patents - 2 Matching Results
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- Vacuum-Energized Make-and-Break Spark-Plug.
- Patent for a vacuum-energized make-and-break spark plug that "relates to new and useful improvements in ignition apparatus for internal combustion engines" (lines 16-18) including instructions and illustrations.
- Vacuum-Operated Make-and-Break Spark-Plug.
- Patent for simple and efficient improvements to vacuum-operated make-and-break spark plugs, including illustrations and instructions.