Nasal Defense guru fights off ‘Sharks’ on the way to product success Seven years ago, Joe Moore nearly left the Shark Tankempty-handed. Seven years later, his entrepreneurial acumen has its own impressive teeth. Moore was all but laughed off the stage while presenting his nasal screen product on the TV show in 2011. But he found vindication when the sharks offered $4 million and a 10 percent lifetime royalty – a record for the show – to buy the entire business after discovering he already had an order for $8 million. That sale offer was rejected, but Moore did agree…