In reference to the patent: US5710377
In what countries is patent US5710377A effective/protected currently?
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This is a US patent. You can tell by the publication numbers:
both of which begin with the letters "US".
The patent would be expired as of 2015, since it was filed in 1995. (The grant was in 1998, but the period of protection extends retroactively from the date of first filing.
I didn't see any links to an international application, so the protection would have been in the US exclusively.
extension of duplicate Is this patent valid in USA or Australia? ; A person need to cross-check kind codes of patents for granted patent.
Limitation:- EPO or INPADOC database might have inherent limitation e.g. non avalability or software errors. try more with inventor and applicant search.