31316919reprographic processesPT2026-03-30 20:25:20UF31316920processes, reprographicNDUF31316921reprographic processNDBT31304047copyingPTNT31340249spirit duplicatingPTNT31340253mimeographyPTNT31340259facsimile transmissionPTNT31340265hectograph processPTNT31340272thermal copyingPTNT31340283light-sensitive reprographic processesPTNT31340286verifaxPT