President Obama signed a bill to help Americans get patents for inventions Friday morning, but in his speech at a science and tech school in northern Virginia, he quickly pivoted to talking about his jobs bill that has rankled both Republicans and Democrats. After acknowledging a handful of members of Congress in his audience at Thomas Jefferson High School in Alexandria, Obama said he didn’t want to pass up the chance to make another pitch for his plan. “I’ve got another bill that I want to get passed to help the economy right away. It’s called the American Jobs Act,”...