AU71331A
(en )
1931-10-22
Improvements in or relating to trusses
AU2876030A
(en )
1931-09-10
Improvements in or relating to range finding and distance measuring devices
CA305447A
(en )
1930-11-04
Measuring and computing instrument
AU2487630A
(en )
1931-04-02
Improvements in and relating to speedometers
AU1786929A
(en )
1930-01-28
Improvements in and relating to liquid-meters
AU2661630A
(en )
1931-05-07
Improvements in and relating to water -eaters
AU2406629A
(en )
1930-08-19
Improvements in or relating to picture-telegraph and like apparatus
AU2782130A
(en )
1931-02-26
Improvements in and relating to cartography
CA300498A
(en )
1930-05-27
Combined level and plumb
AU2538630A
(en )
1930-03-03
Improvements in or relating to carbonmicrophones
AU2596530A
(en )
1930-12-23
Improvements in or relating to indicating systems
AU3091230A
(en )
1931-05-21
Improvements in or relating to light sensitive devices
AU2881030A
(en )
1931-03-19
Improvements in or relating to electric measuring instruments
AU2398229A
(en )
1930-12-09
Improvements in and relating to casements
CA306949A
(en )
1930-12-23
Measuring or protecting device
AU2807830A
(en )
1931-08-06
Improvements in or relating to wave-signalling systems
AU1899729A
(en )
1930-04-01
Improvements in or relating to acoustic devices
AU2930630A
(en )
1931-06-25
Improvements in and relating to sprinklers
AU3042330A
(en )
1931-12-03
Improvements in and relating togas meters
AU2662130A
(en )
1930-11-25
Improvements in and relating to containers
AU2737330A
(en )
1931-06-18
Improvements in and relating to containers
AU2438029A
(en )
1930-08-26
Improvements in or relating to resistances
AU2649230A
(en )
1931-03-19
Improvements in or relating to trusses
AU2796230A
(en )
1931-04-23
Improvements in and relating to saucers
AU2168829A
(en )
1930-03-25
Improvements in or relating to film and like containers