Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 5825864 | Personal automatic registration system with call forwarding The Personal Automatic Registration System (PARS) is a system of electronic circuits which have been designed to recognize a signal the presence or absence of a designated object or person within a specific area. The basic system consists of a transportab... | 10/20/1998 |
| 5628050 | Disaster warning communications system The Disaster Warning Communications System is a message relay system designed to provide backup warning of impending natural hazard in areas where normal communications are vulnerable to losses imposed by geographic influence. It has been designed to take... | 05/06/1997 |
