One rainy day last November, Myhrvold held an “invention session,” as he calls such meetings, on the technology of self-assembly. What if it was possible to break a complex piece of machinery into a thousand pieces and then, at some predetermined moment, have the machine put itself back together again? That had to be useful. But for what?

The meeting, like many of Myhrvold’s sessions, was held in a conference room in the Intellectual Ventures laboratory, a big warehouse in an industrial park across Lake Washington from Seattle: plasma TV screens on the walls, a long table furnished with bottles of Diet Pepsi and big bowls of cashews.

Chairing the meeting was Casey Tegreene, an electrical engineer with a law degree, who is the chief patent counsel for I.V. He stood at one end of the table. Myhrvold was at the opposite end. Next to him was Edward Jung, whom Myhrvold met at Microsoft. Jung is lean and sleek, with closely cropped fine black hair. Once, he spent twenty-two days walking across Texas with nothing but a bedroll, a flashlight, and a rifle, from Big Bend, in the west, to Houston, where he was going to deliver a paper at a biology conference. On the other side of the table from Jung was Lowell Wood, an imposing man with graying red hair and an enormous head. Three or four pens were crammed into his shirt pocket. The screen saver on his laptop was a picture of Stonehenge.

“You know how musicians will say, ‘My teacher was So-and-So, and his teacher was So-and-So,’ right back to Beethoven?” Myhrvold says. “So Lowell was the great protégé of Edward Teller. He was at Lawrence Livermore. He was the technical director of Star Wars.” Myhrvold and Wood have known each other since Myhrvold was a teen-ager and Wood interviewed him for a graduate fellowship called the Hertz. “If you want to know what Nathan was like at that age,” Wood said, “look at that ball of fire now and scale that up by eight or ten decibels.” Wood bent the rules for Myhrvold; the Hertz was supposed to be for research in real-world problems. Myhrvold’s field at that point, quantum cosmology, involved the application of quantum mechanics to the period just after the big bang, which means, as Myhrvold likes to say, that he had no interest in the universe a microsecond after its creation.

The chairman of the chemistry department at Stanford, Richard Zare, had flown in for the day, as had Eric Leuthardt, a young neurosurgeon from Washington University, in St. Louis, who is a regular at I.V. sessions. At the back was a sombre, bearded man named Rod Hyde, who had been Wood’s protégé at Lawrence Livermore.

Tegreene began. “There really aren’t any rules,” he told everyone. “We may start out talking about refined plastics and end up talking about shoes, and that’s O.K.”

He started in on the “prep.” In the previous weeks, he and his staff had reviewed the relevant scientific literature and recent patent filings in order to come up with a short briefing on what was and wasn’t known about self-assembly. A short BBC documentary was shown, on the early work of the scientist Lionel Penrose. Richard Zare passed around a set of what looked like ceramic dice. Leuthardt drew elaborate diagrams of the spine on the blackboard. Self-assembly was very useful in eye-of-the-needle problems—in cases where you had to get something very large through a very small hole—and Leuthardt wondered if it might be helpful in minimally invasive surgery.

The conversation went in fits and starts. “I’m asking a simple question and getting a long-winded answer,” Jung said at one point, quietly. Wood played the role of devil’s advocate. During a break, Myhrvold announced that he had just bought a CAT scanner, on an Internet auction site.

“I put in a minimum bid of twenty-nine hundred dollars,” he said. There was much murmuring and nodding around the room. Myhrvold’s friends, like Myhrvold, seemed to be of the opinion that there is no downside to having a CAT scanner, especially if you can get it for twenty-nine hundred dollars.

Before long, self-assembly was put aside and the talk swung to how to improve X-rays, and then to the puzzling phenomenon of soldiers in Iraq who survive a bomb blast only to die a few days later of a stroke. Wood thought it was a shock wave, penetrating the soldiers’ helmets and surging through their brains, tearing blood vessels away from tissue. “Lowell is the living example of something better than the Internet,” Jung said after the meeting was over. “On the Internet, you can search for whatever you want, but you have to know the right terms. With Lowell, you just give him a concept, and this stuff pops out.”

Leuthardt, the neurosurgeon, thought that Wood’s argument was unconvincing. The two went back and forth, arguing about how you could make a helmet that would better protect soldiers.

“We should be careful how much mental energy we spend on this,” Leuthardt said, after a few minutes.

Wood started talking about the particular properties of bullets with tungsten cores.

“Shouldn’t someone tell the Pentagon?” a voice said, only half jokingly, from the back of the room.

How useful is it to have a group of really smart people brainstorm for a day? When Myhrvold started out, his expectations were modest. Although he wanted insights like Alexander Graham Bell’s, Bell was clearly one in a million, a genius who went on to have ideas in an extraordinary number of areas—sound recording, flight, lasers, tetrahedral construction, and hydrofoil boats, to name a few. The telephone was his obsession. He approached it from a unique perspective, that of a speech therapist. He had put in years of preparation before that moment by the Grand River, and it was impossible to know what unconscious associations triggered his great insight. Invention has its own algorithm: genius, obsession, serendipity, and epiphany in some unknowable combination. How can you put that in a bottle?

But then, in August of 2003, I.V. held its first invention session, and it was a revelation. “Afterward, Nathan kept saying, ‘There are so many inventions,’ ” Wood recalled. “He thought if we came up with a half-dozen good ideas it would be great, and we came up with somewhere between fifty and a hundred. I said to him, ‘But you had eight people in that room who are seasoned inventors. Weren’t you expecting a multiplier effect?’ And he said, ‘Yeah, but it was more than multiplicity.’ Not even Nathan had any idea of what it was going to be like.”

The original expectation was that I.V. would file a hundred patents a year. Currently, it’s filing five hundred a year. It has a backlog of three thousand ideas. Wood said that he once attended a two-day invention session presided over by Jung, and after the first day the group went out to dinner. “So Edward took his people out, plus me,” Wood said. “And the eight of us sat down at a table and the attorney said, ‘Do you mind if I record the evening?’ And we all said no, of course not. We sat there. It was a long dinner. I thought we were lightly chewing the rag. But the next day the attorney comes up with eight single-spaced pages flagging thirty-six different inventions from dinner. Dinner.”