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Canon Patent Application: Canon EF 17-70mm
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Canon Patent Application: Canon EF 17-70mm

Canon has applied for a patent for a Canon EF 17-70 3.5-5.6 consumer zoom.

Focal Length     17.40    35.00   67.98
F-Number          3.23     4.10    5.85
Image Height     21.64     21.64  21.64  
BF               38.38     53.37  84.83

US Patent Application 20180275370

In another similar patent application, Canon has applied for a full frame EF 16-60mm 3-5-6.3 consumer zoom

Focal Length     16.30   24.10   58.00
F-Number          3.59    3.94    6.37
Image Height     21.64   21.64   21.64  
BF               38.42   45.65   83.75

US Patent Application 20180275382

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How to view Japan Patent applications.

Unfortunately, there's no direct way of linking to the patent application (sad!) however, this is the easiest process to view a japan patent or application.

  1. Go to the Japan Patent Office search page.
  2. If it's a patent application (they are usually in the format of Year-Number ie: 2017-011300) then type the patent application number into the second field down from the top where it says publication of patent application. 
  3. Click on search.
  4. Then click on the patent application number link, and there's the patent application!

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