In Reply to: RE: Ultraperm 80 posted by Best audiotransformers on June 11, 2025 at 10:40:54:
"Ultraperm is a brand name of Vacuumschmelze"
Just curious, do you know when they copyrighted or trademarked this name? 3M sold Ultraperm 80 for many years.
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Follow Ups
- RE: Ultraperm 80 - Triode_Kingdom 16:26:11 06/12/25 (4)
- RE: Ultraperm 80 - Best audiotransformers 03:54:14 06/13/25 (3)
- RE: Ultraperm 80 - Triode_Kingdom 06:59:36 06/13/25 (2)
- RE: Ultraperm 80 - dave slagle 15:22:16 06/13/25 (1)
- RE: Ultraperm 80 - Triode_Kingdom 16:37:04 06/14/25 (0)