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The following are among the trademarks & registrations owned by the United States Postal Service:
| CASS™ | CASS Certified™ | Certified Mail™ |
| Delivery Confirmation™ | DMM® | Every Door Direct Mail® |
| EDDM® | Express Mail® | First-Class Mail® |
| First Class Mail International® | Global Express Mail® | IMb™ |
| IM® barcode | Intelligent Mail® | NCOALink® |
| Netpost Mailing Online® | Parcel Post® | Post Office™ |
| P.O. Box® | Postal Service™ | Priority Mail® |
| Registered Mail™ | Signature Confirmation™ | Standard Mail® |
| United States Postal Service® | U.S. Mail™ | U.S. Postal Service® |
| USPS® | USPS Tracking® | www.usps.com® |
| ZIP+4® | ZIP Code™ |
- This is not a comprehensive list of all Postal Service trademarks.
The following are among the trademarks & registrations owned by PostCentric:
| Click2Mail® | Click2Mail.com™ | Click-N-Mail™ |
| Business-Class Mail™ | Click2Mail Mailing Online™ | RemindSanta™ |
| EasyLetterSender™ | PostFul™ |
