1. Egerton Ch 8122 Reference (shelfmark): Egerton Ch 8122 Title: Scope & Content: William Mason: Signet Warrant for inventor's patent to: 1724. Inventions: Signet Warrants for patents for inventions: 1717-1725. Thomas Chamflower: Signet Warrant for inventor's patent to: 1724. Collection Area: Western Manuscripts Languages: English Date Range: 1724 Extent: 1 item