Patents related to photo lenses

Started 6 months ago | Discussions thread
Chris Noble
Chris Noble Veteran Member • Posts: 3,468
Re: Issued claims are what counts

Dibyendu Majumdar wrote:

Chris Noble wrote:

Dibyendu Majumdar wrote:

Hi,

Starting a new thread - not specific to Nikon lenses unlike the previous threads here and elsewhere (see https://www.dpreview.com/forums/post/63122995).

The diagrams that show the optical construction are a good start, but the specific issued claims are what counts. They are often quite narrow and may refer to a specific characteristic of a single element. A competing lens with just a different characteristic for that single element would likely not infringe.

Also, patent applications (which are publicly available on the patent office website and "look like" an issued patent to a lay-person and to many sloppy journalists) often include a wide range of claims that can be brutally edited down by the patent examiner during the patent prosecution stage, which can last several years. There is no penalty for infringing on a patent application, only on the issued patent and only on the claims that actually issue. Many patent applications are abandoned during the prosecution stage.

Hi, as already mentioned by ipopov, we don't really care about whether a patent is at application stage or has been issued, or whether it is enforceable. The patents are valuable sources of information regarding the design of photo lenses.

Hi Dibyendu, how about saying it a third time? Or something original instead?

Or even better: read my post? Maybe you'll understand that nothing guarantees that the lens design shown in a patent application is the actual lens design of the applicant, only the aspects that are referred to in the claims? Or then again maybe not.

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