Pocket Watch Patents

The following gallery contains patents that were issued or assigned to Columbia Watch Co. or individuals known to be associated with the company at the time. Not all designs were fully implemented into production.

Art Of Making Duplex Escapement Wheels

Patent Number:	515861
Description:	Art Of Making Duplex Escapement Wheels
Inventor:	Eisen Herman Joseph
Assignee:	Locke Edward A
Patent Date:	Mar 6, 1894
Registration Type:	Patent

Escape Wheel Duplex

Patent Number:	515862
Description:	Escape Wheel Duplex
Inventor:	Eisen Herman Joseph
Assignee:	Locke Edward A
Patent Date:	Mar 6, 1894
Registration Type:	Patent