Every week the U. S. Patent Office grants an average of 770 patents. Among inventions recently patented are:
> Women's shoes which can be raised or lowered by a screw-operated jack in the heels.
> A golf putter equipped with a two-handed grip and a leveling gauge, for easing strain and better sighting.
> A combination policeman's billy and gun.
> A buoyant bathing suit, woven from tubular threads containing tiny, air-filled capsules.
> An apparatus which wakes a drowsing automobile driver by blowing ammonia vapor into his face when he relaxes his grip on the...