| Patents for B43M 7 - Devices for opening envelopes (428) |
|---|
| 04/02/1980 | EP0009265A2 A method of severing cellulosic paper at a fold therein |
| 03/25/1980 | US4194342 Degradation by organic acid |
| 03/04/1980 | CA1072835A1 Envelope processing machine and method |
| 02/19/1980 | US4189341 Treating edges with sensitizers and developers |
| 07/03/1979 | US4159611 Envelope processing machine and method |
| 05/29/1979 | CA1055333A Envelope flap separating and distending method and mechanism |
| 03/20/1979 | US4144786 Envelope edge slitting apparatus |
| 03/06/1979 | US4142430 Envelope opener |
| 02/20/1979 | US4139977 Envelope processing machine |
| 11/14/1978 | US4124968 Content activated envelope extraction |
| 11/07/1978 | US4123890 Envelope opening apparatus and method |
| 11/07/1978 | CA1041852A1 High speed edge carbonizing envelope opening machine |
| 10/31/1978 | CA1041388A1 Envelope extractor that cuts through only one panel |
| 10/17/1978 | CA1040573A2 Mail processing equipment |
| 10/17/1978 | CA1040408A1 One-hand operated cutting device |
| 09/05/1978 | US4110958 Extraction of contents from envelopes |
| 04/04/1978 | US4082603 Envelope opening process |
| 04/04/1978 | US4081907 Letter opener device |
| 01/24/1978 | US4069585 Letter opener |
| 01/17/1978 | US4069011 Envelope opening machine |
| 09/27/1977 | US4050222 Envelope opening apparatus |
| 04/12/1977 | US4016708 Envelope processing machine |
| 11/30/1976 | US3994714 N-(3-chloro-4-methoxyphenyl)-n*,n*-dimethylurea |
| 09/14/1976 | US3979884 Mail extracting and sorting desk |
| 08/17/1976 | US3974749 Envelope flap separating and distending method and mechanism |
| 06/15/1976 | US3962848 Envelope flap processing apparatus |
| 04/27/1976 | US3952874 Mail processing equipment |
| 03/16/1976 | US3943807 Automated envelope opener |