The wording “om namo viposahi patanam” does not appear to be a standard Jain phrase in this exact form.

In general, “Om Namo” means “I bow to” or “salutations to.” So the phrase is likely a reverential salutation, but the exact meaning depends on the correct original spelling in Prakrit/Sanskrit.

If you want, I can help interpret it more accurately if the original Jain wording is written clearly.