Apple and Microsoft hold utility and design ones.

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Big companies have the lawyers and the money to build ring fences of utility and design patents around their products so only the largest and best-financed competitors can even think of entering their markets, he said.

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Dorsey says he admires the bridge's utility and elegant design, which he called "this perfect intersection between art and engineering, " and believes software should work the same way.

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What Apple (and again Microsoft) does have is a number of design and utility patents.

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Apple presented its case first and called its last witness earlier this week, arguing that Samsung has infringed on both design and utility patents that cover the look and feel of its best-selling products and how they work.

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For one, its design is of limited utility.

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For the spy with a yen to be green, the house has low utility bills courtesy of a passive solar design, low-E windows and solar-generated water heater.

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He later finished his degree at the Rhode Island School of Design, where honed his design skills, built out sport utility vehicles from spare parts and fleshed out the idea of what would become the basis of the C-1.

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Only then did we look at the supply-side options, evaluating utility programs, potential state support, and what would work best with our building design.

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