Spark plug with dual electrodes for internal combustion engines

Read the whole patent

Listed from its IP Australia record in Patent Yard's archive of Australian patents past their term. Its claims, description and drawings are in the AusPat record and on Google Patents, and the Claude kit works from them.

Why it's free to use

• Filed March 21, 1989. An Australian petty patent lasted at most 6 years from its date of patent, at most a year after this filing, so it ended by March 21, 1996.
• We check Australian rights only. A patent in its family in another country could still be in force.