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| Patents for L. S. Heald & Son | |||||
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| Number | Date | Patentee | Title | Type | |
| 567,135 | Sep. 08, 1896 | L.S. Heald | Rotary cutter | window making machines | |
| 630,536 | Aug. 08, 1899 | L.S. Heald, J.N. Heald | Drill-grinding machine | drill grinders | |