Author talk:William Thornton Firth
Latest comment: 5 months ago by Noracrentiss in topic William Thornton Firth
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William Thornton Firth[edit]
William Thornton Firth was granted Patent 13086 for "AN IMPROVED PUMICE INSULATOR FOR THE EXCLUSION OF HEAT, COLD, OR SOUND" on 1901. Noracrentiss (talk) 02:14, 4 December 2023 (UTC)