Thirty years after the first cellular phone call, inventor Martin Cooper still dreams about the day when futuristic telephone technology is a reality.

Cooper’s dream telephone is so small that it fits behind his ear, automatically dials out when he thinks about calling someone and it notifies him of incoming calls with a tickle instead of a ring.

The 74-year-old Cooper has yet to see that vision become a reality, but in the three decades since he invented cell phones, more than half of Americans have come to own them. Their size has shrunk so much that they fit into users’ palms. At about 4 ounces, a cell phone weighs little more than a lemon.

That’s a far cry from the 30-ounce phone Cooper used when he made the first portable phone call on April 3, 1973 — 30 years ago. The phone was 10 inches high, 3 inches deep and an inch-and-a-half wide.

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