Hibbard, Spencer, Bartlett & co what year was this made?

[rflem59801]

Have a Hibbard, Spencer, Bartlett, & Co scout knife with patent # 701-878. Does anyone know how to look up old patents to see when it was made?

[peanut740]

Knife was made for HSB by New York knife Co pre-1931.

[tongueriver]

Patent dates only suggest when the earliest possible manufacture date might be, sorta. Schrade and Western stamped patent numbers/dates on their knives which remained unchanged for decades.

[rflem59801]

Thanks for the information.