Im researching into these V blade slicers and accordingly the first V-blade slicers, mader by Borner, patents expired back in 1989.

Here's a patent they had but expired:


And another:


However they keep applying for new patents for products with similar features.

Example of patent here:


The product i've researched into is this:


Quite a few sellers sell this item but not sure would it infringe on any patents from Borner.

Hope someone can help because this situation is rather confusing.



  • Welcome to Ask Patents! Would it be possible for you to list out a specific patent (namely, a claim or two from the patent) that you're curious about? We can sometimes help with requests like this, if they're phrased right, but we need a bit more information to go off of. Please let me know if you have any questions. – Matthew Haugen Jul 13 '15 at 4:24
  • Hi I've updated the question with the patents involved. Hope someone can help. – benny18 Jul 14 '15 at 8:09
  • Awesome, thanks. Now that we've got that information, could you clarify a bit about what specifically you're wondering about? I understand that there's this product sold on Amazon, and what appears to be another company has some patents on a related invention that they've been improving over the years. – Matthew Haugen Jul 14 '15 at 9:18
  • Are you wondering about whether the product infringes on those patents? If so, I'd appreciate if you could include some details, like that you feel the blade design infringes on the first claim of the second listed patent, or whatever else it may be. It doesn't have to be quite that specific, but the more detail, the better. On the other hand, are you curious about the legality of re-filing for expired patents and what that company is doing? – Matthew Haugen Jul 14 '15 at 9:18
  • Specifics go a long way to finding you the best answer possible, the soonest, and making sure that future users can find your question if they're curious about the same thing. – Matthew Haugen Jul 14 '15 at 9:18

Browse other questions tagged or ask your own question.