A device for connecting a first optical fiber end held by a first connector plug selectively to second or third optical fiber ends held by different types of connector plugs, in which each different type of plug has an associated connector socket, these sockets each including a non-circular ...http://www.google.com.au/patents/US5717801?utm_source=gb-gplus-sharePatent US5717801 - Device for connecting optical fiber ends held by different types of connector plugs 
