How are Statutory Invention Registrations (SIRs) numbered?
Statutory Invention Registrations (SIRs) have a specific numbering system. According to MPEP 901.06(d): “Statutory Invention Registrations are numbered with document category “H,” beginning with “H1.” This unique numbering system distinguishes SIRs from regular patents and other USPTO publications. It’s important for patent searchers and examiners to be aware of this system when conducting prior art…
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