Which patents say a sealed message can be changed or answered, and what happens?

"Additional security features available to the sender include restricting recipients from forwarding the message, printing the message or adding additional recipients to any response to an encrypted message."

"In such cases, the recipient 306 may generate a message to the sender 300 informing the sender 300 that the recipient 306 cannot access the encrypted message 310 ."

"For added security, if the recipient 306 is not registered with the encryption system servers 100 , additional restrictions can be implemented such that the recipient may not be able to forward, print or add additional recipients on any reply sent to the sender 300 and the encrypted message is kept at the encryption servers 100 for a sender defined life."

"12. The public key encryption systems of claim 1 , where the sender of the encrypted first message creates a life period for the content so that at the end of the life period the content is deleted."

"11. The public key encryption systems of claim 1 , where the sender of the encrypted first message restricts the recipient from adding recipients in a reply to the contents of the first message."

"A second type of watermark may indicate that a delivery confirmation message is to be dispatched to the sender of the envelope. When such an envelope is presented to the recipient's web cam, the associated computer automatically composes an email message confirming delivery of the envelope, and sends it to an address represented in the watermark."

"The linked web address may present a form soliciting input or response from the envelope recipient, including survey responses, votes, etc."

"The method of claim 34 in which the response comprises updating a contact database on said device with information corresponding to a sender of said envelope."

"The method of claim 34 in which the response comprises sending a delivery confirmation to a sender of said envelope."

"The method of claim 34 in which the response includes directing an internet web browser to an internet destination."

"In this arrangement, envelope 600 may be sent from a sender to a recipient with an item in the pocket. Upon receipt, the recipient pulls removable access strip 618 upward, tearing it away from the envelope along perforations lines 616 , 620 ."

"Once the correspondence is received by the recipient, such recipient simply removes the correspondence from the two-way mailer by pulling an opening tab, re-inserts an appropriate response correspondence, re-seals the main flap, and mails the envelope back to the original sender."

"After new contents are inserted, seal flap 61 is used for sealing reply envelope 80 for the return trip."

"uses the reciprocating envelope. When it is received, cut it at the cutting line at the center of the opening tongue, apply adhesive to the lower glued part, and partially cut the opening tongue via adhesive. Seal."

"To return the item to the sender, the recipient places the item back in the pocket by sliding it laterally inward. The return sealing adhesive is activated, for example, by peeling off its non-stick cover layer, and the return sealing strip 615 is then sealed to bottom panel 604 ."

"the recipient is able to remove the correspondence 55, and replace it with response correspondence 56 such as payment."

"To resend the new reply envelope 80 , seal flap 61 is folded up and bottom lip 19 flattened into the plane of seal flap 61 . An affixer 62 provided on seal flap 61 , preferably including being provided on bottom lip 19 , is used for sealing the envelope when the smaller reply envelope is going to be returned."

"is to provide a reciprocating envelope that can be used not only as an outgoing credit but also as a reply envelope, and can be opened without using scissors, etc., and used as a reply envelope."

"An envelope as recited in claim 1 , further comprising means for sealing the recipient address panel over the sender address panel to form a closed envelope that may carry a response item."

"The envelope is resealable by the recipient without obscuring the return mail indicia so that the envelope may be returned to the sender by re-mailing the envelope."

"the reply destination and the like are hidden in the sealed state of outgoing credit, and the reply destination and the like appear in the sealed state of the reply."

"In this configuration, a fragile item may be conveyed from a sender to a recipient and from the recipient back to the sender, without damage to the item."

"Further, the present invention discloses a letter sheet in which there is provided an integral envelope for the recipient to use in return mail."

"In conclusion, herein is presented a self-reply envelope system, that allows dual correspondence between a sender and a recipient using a single envelope."

"If the tongue is cut from the base with scissors, it cannot be used as a reciprocating envelope anymore."

"Such a procedure allows the recipient to insert into the pocket of the reply envelope 23 such material as he may desire and then seal the envelope 23 by revolving panel 29 about score line 27"

"A recipient of the envelope can thus simply detach the return envelope portion from the envelope mailed to his/her."

"there is shown a letter sheet and integral envelope in which the recipient may remove the message sheet 22 and return the reply envelope to the sender or other suitable place."

"For mailing out a purchase order for goods or commodity based on the offered merchandise information mailed in or returning a survey paper or questionnaire so received and filled in, or doing a similar response action, the recipient has no need to prepare an envelope anew and can simply use and address on the detached envelope portion now as a fresh envelope and send it out."

"leaves panel 30 exposed to view upon which the sender may have inscribed his return address or may have left a blank to allow the recipient to place whatever information upon it that would be desired."

"In this case, the sender may very well care to have the return envelope portion self-addressed to eliminate the need for the recipient to address the return envelope on his/her its own."

"Another object of this invention is the provision of a letter sheet having an integral return mail envelope that may easily be detached from the letter, sealed and returned to the sender."