According to one exemplary embodiment of the present invention, a dental syringe includes a barrel extending along a longitudinal axis and including an interior space and a longitudinal window formed in a side wall of the barrel for receiving a cartridge that contains medication. A flexible flange member...http://www.google.co.uk/patents/US20070265579?utm_source=gb-gplus-sharePatent US20070265579 - Dental syringe
