Amihai Ben-David, chief executive of N-trig, demonstrates a pen and touch device at his office in Kfar Saba, near Tel Aviv April 6, 2009. N-trig, an Israeli start-up that makes a pen and touch device for notebook computers, would seek to go public on Nasdaq in late 2010 if the economy improves, Ben-David said on Monday. N-trig produces a panel that is placed over an LCD screen on a notebook, providing the ability to operate a computer through touch, in the style of the iPhone. It is accompanied by a stylus that enables the user to also write on the screen. REUTERS/Gil Cohen Magen (ISRAEL SCI TECH BUSINESS)