The details of the Madras High Court order restraining TVS are available here. The HC has said that Bajaj has established a prima facie case in its favour owing to the fact that its patent was unchallenged for a considerable period. I believe this was an apprehension rightly expressed by Manisha Singh Nair in her article. TVS Motors seems to have contended that use of twin spark plugs in a cylinder of small bore (diameter) size does not amount to an inventive step to which the Court replied by saying that complex issues which go to the merits of the case need not be considered at this stage and that prima facie consideration was sufficient. It may be recalled that in its patent, Bajaj has claimed inventiveness in the use of twin spark plugs in engines of 100-220cc, which according to TVS is obvious since dual ignition technology, according to it, has long been part of prior art.