Canon 20-40mm F4 IS and 26-40mm F4.5-6.3 IS Patents Found
Canon Power Zoom Patents: Canon 15-30mm F4-6.3 PZ, 20-50mm F4-5.6 PZ, and 12-30mm F4-6.3 PZ With Internal Zoom
Canon Memory Card Cooling Patent Might Apply to Canon R1 and Canon R5 Mark II
Tamron 50-200mm f/2.8 Patent Found
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