October 13, 2003 - Many of the patents tenaciously won by Massachusetts inventors are for ordinary but nevertheless important objects.
Eight years ago, Brendan McSheffrey had his billion-dollar brainstorm. This month, his mom and dad are finally bringing Brendan's invention to market, one of the biggest innovations in decades to come to a ubiquitous piece of technology few people ever think about: fire extinguisher pressure gauges.