Canon 180mm f/3.5 Macro lens patent (2011191743):
Canon 65mm f/2.8 Macro lens patent (2011191743):
Panasonic patents (2011191468, 2011191469) for adapter ring and lens barrel with a built-in filter:
Patent 2011197469 is for a 18-175mm f/3.5-5.6 zoom lens from Panasonic:
