| 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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| 02/12/1992 | CN2095839U 方便信封 Convenient envelope |
| 02/12/1992 | CN2095838U Convenient adhesive stick envelope |
| 02/12/1992 | CN2095837U Economic envelope |
| 01/29/1992 | EP0468256A1 Envelope with adhesive closure |
| 01/29/1992 | CN2094512U Convenient counter closing envelope paper |
| 01/09/1992 | WO1991018377A3 Tamper resisting security seal |
| 01/01/1992 | CN2091824U Convenient postal mark |
| 01/01/1992 | CN1015249B Open-chaining counter-symmetrical extended square cabin |
| 12/31/1991 | US5077001 Tamper-evident sealing system for envelope having special characteristics and method of making same |
| 12/24/1991 | US5074459 Mailing envelope |
| 12/18/1991 | CN2090806U 方便信封 Convenient envelope |
| 12/11/1991 | EP0460459A1 Tamper evident seal for envelopes |
| 12/11/1991 | CN2090365U Envelope |
| 12/10/1991 | US5071399 Method of making a mailer with tear strip on outgoing and return envelopes |
| 12/10/1991 | US5071061 Reusable routing pouch |
| 12/04/1991 | CN2089915U Envelope |
| 12/03/1991 | US5069384 Envelopes |
| 11/28/1991 | WO1991018377A2 Tamper resisting security seal |
| 11/26/1991 | CA1292450C Mass mailer |
| 11/20/1991 | CN2088980U Standard envelope |
| 11/20/1991 | CN2088979U Envelope capable of reusing |
| 11/19/1991 | US5065915 Hinged multiple garment hanger |
| 11/19/1991 | CA1292207C Letter form and a process for the production of a letter form |
| 11/07/1991 | DE4114373A1 Envelope with address compartment - has separate closable compartment for private letter |
| 11/05/1991 | US5062530 Compact file for letters and other documents |
| 10/30/1991 | CN2087608U Double-journey to-and-fro envelope capable of keeping original length and width |
| 10/29/1991 | US5060847 Film processing envelope with optional removable negative pouch |
| 10/29/1991 | CA1291461C Resealable envelope |
| 10/23/1991 | CN1055520A Artistic envelopes |
| 10/16/1991 | CN2086724U Opening of flour sack for easily and hygienically taking flour out |
| 10/09/1991 | EP0450774A1 Envelope for preparing a multi-sheet mail piece |
| 10/02/1991 | CN2085774U Practical plastic envelope |
| 10/02/1991 | CN1054943A Return envelope and reply card |
| 10/01/1991 | US5052977 Multiple web business form |
| 10/01/1991 | US5052613 Two-way envelope |
| 10/01/1991 | US5052560 Confection holding structure for use in envelopes |
| 09/25/1991 | EP0447894A1 Mailing envelope |
| 09/25/1991 | EP0447689A1 Container for pulverized and granular products, such as medicines |
| 09/25/1991 | EP0422205A4 Envelope with single peel-off backing sheet to facilitate printing and copying |
| 09/25/1991 | CN2085354U Envelope with glue tape and colour strip |
| 09/24/1991 | US5050729 Tooth storage container |
| 09/18/1991 | EP0447209A1 Tear-open mailing envelope |
| 09/18/1991 | CN2084911U Moisture-proof packing bag with repeatedly opened or closed mouth |
| 09/15/1991 | CA2037964A1 Tear-open mailing envelope |
| 09/13/1991 | CA2037604A1 Envelope form for preparing a multi-sheet mail piece |
| 09/11/1991 | CN2084456U Envelope |
| 09/10/1991 | US5046621 Tamper evident notched sealing envelope |
| 09/04/1991 | CN2084038U Double envelope |
| 08/23/1991 | CA2034123A1 Speedimailer with tear strip on ongoing and return envelope |
| 08/20/1991 | US5040720 Return envelope mailer |
| 08/14/1991 | EP0440774A1 Container. |
| 08/14/1991 | CN2082707U Easy closed-open envelope |
| 08/13/1991 | US5039000 Mailer with tear strip on outgoing and return envelopes |
| 08/08/1991 | WO1991011332A1 Method for permanently closing a pocket enclosing documents and a pocket for carrying out the method |
| 08/07/1991 | CN1053590A Film envelope used back and forth |
| 07/31/1991 | CN2081826U Integrative envelope |
| 07/31/1991 | CN2081825U Envelope with opener |
| 07/30/1991 | CA2008841A1 Improved perforation system |
| 07/25/1991 | DE4001499A1 Additional marking of document in envelope - uses releasable adhesive layer round inner edge limited size opening |
| 07/10/1991 | CN2080493U Envelope |
| 06/25/1991 | US5025980 Double use express mail envelope |
| 06/18/1991 | US5024373 Container for pulverized and granular products, such as medicines |
| 06/11/1991 | US5022683 Check insert and envelope |
| 06/05/1991 | CN2078295U Multifunctional envelope |
| 06/05/1991 | CN2078294U Envelope with liner for postal purpose |
| 06/05/1991 | CN2078293U Convenient envelope no necessary to stick on stamp |
| 05/14/1991 | CA1284136C Easily feedable envelope construction |
| 05/02/1991 | WO1991005708A1 Pouch for photographs and film strips and device for packing photographs and film strips in such a pouch |
| 05/01/1991 | CN2076074U Quick-opening envelope |
| 04/25/1991 | DE3934001A1 Tasche zur aufnahme von fotos und filmstreifen und vorrichtung zum abpacken von fotos und filmstreifen in einer solchen tasche Pocket for acceptance of photos and film strip and device for pack of photos and film strip in a bag such |
| 04/24/1991 | CN2075627U Reused envelope |
| 04/23/1991 | US5009953 Containing fluoropolymer antiflecting agent and acid scavenger |
| 04/17/1991 | EP0422205A1 Envelope with single peel-off backing sheet to facilitate printing and copying |
| 04/10/1991 | EP0421976A1 Envelope, especially bag for processing photographs |
| 04/09/1991 | US5005758 Envelope constructed for ink jet printing |
| 04/09/1991 | CA1282874C Semiconductor devices employing high resistivity in p-based epitaxial layer forcurrent confinement |
| 04/03/1991 | CN2074288U Easy to open envelope within non-drying glue used as letter paper |
| 03/28/1991 | DE3931170A1 Security container esp. for use in banks - has preferred opening region between two gripping sections for reliable automatic opening and emptying |
| 03/27/1991 | EP0418340A1 Variable size envelope with single closure flap |
| 03/27/1991 | CN2073853U Envelope using pressure-sensitive adhesive closure |
| 03/26/1991 | US5002220 Adhesive closure flap with protective liner and detachable tab |
| 03/21/1991 | WO1991003403A1 Container |
| 03/13/1991 | CN2072945U Open-by-pull envelope |
| 03/12/1991 | US4998666 Tamper indicating containers and seals |
| 03/06/1991 | CN2072514U Sealing piece |
| 03/06/1991 | CN2072513U Multi-purpose envelope |
| 02/27/1991 | CN2072071U Envelope sealed with doube-face adhesive tape |
| 02/20/1991 | CN1049317A Code identification method and envelope |
| 02/20/1991 | CN1049316A Open-chaining counter-symmetrical extended square cabin |
| 02/19/1991 | US4993624 Two-way bar code window envelope |
| 02/09/1991 | CA2022333A1 Readily opening envelope |
| 01/31/1991 | DE4013813A1 Envelope providing proof of posting on letter - has cut=out section for franking letter directly inside |
| 01/24/1991 | DE3922725A1 Envelope with tear off thread - has thread extension for gripping outside envelope |
| 01/16/1991 | CN2069390U Envelope face convenient for computer distinguishing |
| 01/10/1991 | DE3920074A1 Envelope with adhesive separable closures - has side flaps and sealing flap, each with corresp. adhesive and non-stick surfaces |
| 01/09/1991 | CN2068947U Double-sided standard envelope |
| 01/09/1991 | CN1048364A Method for manufacturing standard envelop |
| 01/08/1991 | US4983047 Envelope with closure and seal device |
| 01/01/1991 | US4981251 Mailer |
| 12/12/1990 | EP0402323A1 Envelope for correspondence to tear open |