From within, he brought out a most ingenious device.

An ingenious device was used to get around such conflicts.

Gissing wondered what ingenious device of science this might be.

To make optimum use of the volume, an ingenious device was employed.

The rebels had put together some ingenious devices from materials anyone would have considered harmless.

There are today houses with the remains of ingenious devices for channelling away the water.

I have seen other Arab books that list a series of quite ingenious devices.

Kept in a concealed drawer, opened by an ingenious device, the paper would be well protected.

It was an ingenious device, the whole side of the booth turning through the wall.

Reading is sometimes an ingenious device for avoiding thought.