Here is my question/scenario:

If I want to file a patent in my home country (Canada) in this instance and file it before anyone else, do this prevent anyone else from filing a patent for an identical device in another country like the U.S. or elsewhere?

For my device in question, I cannot find anything in prior art anywhere and believe that my invention is truly unique, so if I file in Canada, would that not serve to block everywhere else because U.S. or other examiners would see my Canadian patent in their prior art search and not grant the patent to someone trying to file in their respective jurisdictions?

I have seen/read about situations where a U.S. firm wanted to patent a device in the U.S. but saw that their work would violate a foreign patent and did not continue even though the foreign patent was only filed in its local jurisdiction and not in the U.S.

Please let me know your thoughts. Thank you all in advance.

Here is my question/scenario:

If I want to file a patent application in my home country (Canada) in this instance and file it before anyone else, does this prevent anyone else from filing a patent application for an identical device in another country like the U.S. or elsewhere?

For my device in question, I cannot find anything in prior art anywhere and believe that my invention is truly unique, so if I file in Canada, would that not serve to block everywhere else because U.S. or other examiners would see my Canadian patent application in their prior art search and not grant a patent to someone trying to file in their respective jurisdictions?

I have seen/read about situations where a U.S. firm wanted to patent a device in the U.S. but saw that their work would violate a foreign patent and did not continue even though the foreign patent was only filed in its local jurisdiction and not in the U.S.

Please let me know your thoughts. Thank you all in advance.