| Patents for B65D 27 - Envelopes or like essentially-rectangular flexible containers for postal or other purposes having no structural provision for thickness of contents (3,640) |
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| 03/28/1978 | US4081127 Return envelope for mailer and method |
| 02/07/1978 | US4072264 Duplex mailing envelope |
| 01/03/1978 | US4066206 Continuous envelope assembly |
| 12/27/1977 | US4064645 Sachet for the attachment of stamps, tokens and like devices to containers |
| 11/15/1977 | US4058251 Folded money pack envelope |
| 11/01/1977 | US4056191 Stubless multi-part assembly |
| 10/25/1977 | US4055295 Self-sealing envelope and method of making same |
| 10/04/1977 | US4051996 Travel envelope construction having integrally formed baggage identification labels |
| 09/27/1977 | US4050582 Sealed envelope assembly with locking pockets for free insert material |
| 09/13/1977 | US4047661 Print envelope |
| 08/16/1977 | US4042171 Travel envelope construction having integrally formed elongated baggage identification tags |
| 07/12/1977 | US4034910 Combination advertising, coin and receipt holding envelope |
| 06/28/1977 | US4031818 Apparatus for preparing sealed envelope units with messages |
| 05/10/1977 | US4022374 Adjustable envelope |
| 04/05/1977 | US4015771 Packaging bag of thermoplastic synthetic plastic film |
| 03/15/1977 | US4011985 Combined advertising insert and mailing envelope |
| 02/22/1977 | US4008852 Apertured mailing card and method of using |
| 02/15/1977 | US4007868 Container for card |
| 01/25/1977 | US4004728 Machine fillable envelope |
| 01/11/1977 | US4002290 Envelope assembly |
| 12/28/1976 | US3999700 Credit card mailer |
| 12/07/1976 | US3995808 Unit containing variable messages |
| 11/09/1976 | US3990628 Plastic bag with zig zag plies |
| 10/19/1976 | US3986662 Combination mailing apparatus |
| 09/28/1976 | US3982689 Returnable mailing envelope |
| 09/14/1976 | US3980006 Continuous envelope system |
| 09/07/1976 | US3979051 Multi-compartment envelope |
| 07/27/1976 | US3971507 Folded money pack envelope |
| 07/20/1976 | US3970242 Hosiery envelope |
| 06/15/1976 | US3963174 Permanent envelope |
| 05/11/1976 | US3955842 Locking device |
| 05/11/1976 | US3955752 Locking envelope |
| 05/11/1976 | US3955751 Mailing device |
| 04/27/1976 | US3952871 Machine loadable multi-pocket, multi-section article carrier stock |
| 04/13/1976 | US3950580 Adhesive strips |
| 04/13/1976 | US3949935 Photographic print envelope having adhesive transfer tabs |
| 03/16/1976 | US3944132 Multi-pocketed envelope |
| 03/09/1976 | US3942714 Two-way mailer |
| 03/02/1976 | US3941308 Continuous mailer envelope assembly with inserts and method |
| 03/02/1976 | US3941307 Envelope assembly |