A brand name or proprietary term, possibly relating to darning supplies or textile repair equipment (specific definition uncertain due to limited historical usage).
Likely a modern compound or trademark, possibly combining 'darn' with a suffix like '-ex' commonly used in product naming, though its exact origin and composition remain unclear.
Many product names from the early 20th century have been lost to history, and 'Darnex' is one of those mysterious brand names that occasionally appears in old catalogs and advertisements but has largely disappeared from use.
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