Wireless power transmission is something that inventor Nikolai Tesla came up with over a century ago and claimed to have perfected. However, his mysterious work vanished with his death, and for decades the topic was left untouched. Now there has been a resurgence in interest with several companies competing to becoming the first to offer commercially broadcast wireless power. At the Intel Developers Forum (IDF) this month, Intel demoed just such a system. Using two large coils it showcased a system that could send 60 watts of power at 75 percent efficiency up to 3 feet. The power was enough to light up a bulb at the receiving end.

Intel calls its new technology a "wireless resonant energy link". It uses transmitting loop antennas, less than 2 feet in diameter.

It is competing with a couple scrappy startups, who are also looking to improve upon MIT's technology. Startups WildCharge, based in Boulder, Colo., and WiPower, based in Altamonte Springs, Fla. both are looking to make their name in wireless power history. While both have announced consumer devices based on their upcoming technologies, their devices currently require the item to be touching the transmitter.

The advantage of Intel's device is it can transmit power even when not in contact. And the receiver antenna is about the size of a laptop base, Intel researchers note. Joshua R. Smith, an Intel researcher at a company laboratory in Seattle who is leading the project, states, "From Intel's position that seems like the thing to shoot for right now. It could be that cellphones and P.D.A.'s are even more compelling, but I think we are going to start with the laptop. It's easy to dial down from laptops."

Mr. Smith also demoed how the technology could improve the field of robotics. Sensors using the power transmission and reception technologies could use electric fields to detect objects, similar to how some fish detect objects in water. In a demo the robot used these sensors to neatly grasp an apple, which it then loyally delivered to a waiting human hand.

Intel, according to Mr. Smith, will be developing a prototype of transmission system for laptops, which may be added to upcoming chipsets. Thus, the next generation of laptops may be cord free.