Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4441442 | Self-oiling portable bag-closing sewing machine with pump | Robert J. Robinson, David B. Johnson | 1984-04-10 |
| D268679 | Housing for a portable bag closing sewing machine | David B. Johnson | 1983-04-19 |
| D268266 | Pulley and belt guard for a portable bag closing sewing machine | David B. Johnson | 1983-03-15 |
| D268113 | Handle for a portable bag closing sewing machine | David B. Johnson | 1983-03-01 |
| 4348970 | Self-oiling portable bag-closing sewing machine | Robert J. Robinson, David B. Johnson | 1982-09-14 |