One was called Swan, Edison tried to sue him for patent infringement but Edison's lawyers warned him about prior art, so instead he negotiated a joint venture.

One was called Swan, Edison tried to sue him for patent infringement but Edison's lawyers warned him about prior art, so instead he negotiated a joint venture. You may remember the "Mazda" brand of bulbs https://en.wikipedia.org/wiki/Edison_and_Swan_Electric_Light_Company https://en.wikipedia.org/wiki/Edison_and_Swan_Electric_Light...