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| All Patents in class 177/247 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 9,231X | Nov. 07, 1835 | E. Hibbard | Balance for counters | ||
 | 97,253 | Nov. 23, 1869 | J. Weeks | Scale Beam | |
| 2,680,014 | Jun. 01, 1954 | M.H. Starr | Tyoe Registering Poise | ||