letter patent
- Made:
- 1869
Letter, patent to James Mackenzie for improvements in the weighing machines, with note to condition as the filing of the specification, stamping and producing the patent within three years and do within seven years, 1869.
Letter, patent to James Mackenzie for improvements in the weighing machines, with note to condition as the filing of the specification, stamping and producing the patent within three years and do within seven years, 1869.
