HERCOLYN by PINOVA, INC. (Track this)
Intl: (001) Chemicals US: 006 Filing date: 16-Apr-1932 Serial number: 71326187
HERCO by NORTHROP GRUMMAN SYSTEMS CORPORATION (Track this)
Intl: (013) Firearms US: 009 Filing date: 15-Oct-1926 Serial number: 71238655