There are also considerable legal hurdles to overcome in order to obtain a patent.

There are considerable hurdles beyond paying for the project.

And it would face considerable hurdles, both practical and scientific.

But investigators have also faced considerable hurdles, the chief one being practical: almost all of the flight's wreckage remains underwater.

Not everything has gone like clockwork, and some considerable hurdles remain.

The companies face a considerable hurdle in trying to convince men that they ought to spend more, not less, time shaving.

By 1930, however, the school faced considerable hurdles to keep going.

But there are some considerable technical hurdles in the way before Internet calling can be widely used.

He often has to overcome considerable hurdles, even reversing Federal policies, to deliver his material to the public.

But the agreement, reached yesterday by negotiating teams from the airline and the pilots' union, faces considerable hurdles.