Nice patent here: https://www.google.com/patents/US20140324624?dq=ininventor:%22Peter+Lachapelle%22&hl=en&sa=X&ved=0ahUKEwjZu7HKsebTAhWEj1QKHbj7C7MQ6AEIIzAB Expected to be granted in 2017...hmmmmmmmm