Software firm GL Trade has introduced evidence it claims
invalidates Trading Technologies' (TT) MD Trader patent and has
asked for a summary judgment in its patent infringement case
with the rival ISV.
In a 31 May filing, GL Trade claimed that it had developed a
front-end trading system called Tradepad by December 1998,
which would preempt TT's MD-Trader software patent. GL Trade
claim that Tradepad used the vertical price axis, a dynamic
display of bids and asks, aligned with the price axis and other
items that GL Trade says match the functions in the TT
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