HYDRA-LOK by ABBOTT-INTERFAST CORPORATION (Track this)
Intl: (006) Metal goods US: 013 Filing date: 05-Apr-1976 Serial number: 73082843
HYDRA-ZORB by ZSI, INC. (Track this)
Intl: (006) Metal goods US: 013 Filing date: 17-Feb-1972 Serial number: 72415926
HYDRA by Witzenmann GmbH (Track this)
Intl: (006) Metal goods US: 013 Filing date: 05-Feb-1970 Serial number: 72350595
HYDRA-TURN by DOUGLAS DYNAMICS, INC. (Track this)
Intl: (007) Machinery US: 023 Filing date: 21-Aug-1968 Serial number: 72305641
HYDRA-BRAKE by HYDRA-BRAKE, INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 026 Filing date: 14-Nov-1963 Serial number: 72181144
HYDRA SPRING by UNIPUNCH PRODUCTS, INC. (Track this)
Intl: (007) Machinery US: 023 Filing date: 27-Mar-1952 Serial number: 71627153
HYDRA-MATIC by GENERAL MOTORS LLC (Track this)
Intl: (012) Vehicles US: 023 Filing date: 02-Jan-1940 Serial number: 71427073