[…] can date the first release of a hook. Patents are usually for innovations in technology such as US patent 572809 by Kippenberg in 1896 for the flat (grip, thumb rest) found on most hooks today. British registered […]
[…] can date the first release of a hook. Patents are usually for innovations in technology such as US patent 572809 by Kippenberg in 1896 for the flat (grip, thumb rest) found on most hooks today. British registered […]