SAN JOSE, Calif. — This week, nine jurors are expected to hunker down in a federal courthouse here to decide a case that could change how the world’s smartphones and tablet computers look and work.

After nearly a month of testimony in the legal dogfight between Apple and Samsung over patents, the two parties are expected to make their closing arguments on Tuesday. It will then be up to jurors to hash out which Apple patents, if any, Samsung stepped on when it created devices that compete with the iPhone and iPad. Apple is seeking $2.5 billion in damages from Samsung, while Samsung has asked for $422 million in a countersuit against Apple.

But the effects of the case are likely to be felt far beyond these two companies. If Apple prevails, experts believe Samsung and other rivals in the market will have a much stronger incentive to distinguish their smartphone and tablet products with unique features and designs to avoid further legal tangles.

“I think what we’ll see is a diversification of designs in the marketplace if Apple wins,” said Christopher V. Carani, an intellectual property lawyer for McAndrews, Held & Malloy in Chicago.