ZA72149B
(en )
1972-09-27
Improvements in or relating to tunnelling
HK45677A
(en )
1977-09-16
Improvements in or relating to magnetic devices
ZA725074B
(en )
1973-04-25
Improvements in and relating to locks
ZA72554B
(en )
1972-11-29
Improvements in and relating to ladders
ZA725780B
(en )
1973-09-26
Improvements in or relating to the extraction of metals
HK35476A
(en )
1976-06-18
Improvements in or relating to magnetic devices
MY7900109A
(en )
1979-12-31
Improvements in or relating to thienobenzazepines
ZA72949B
(en )
1972-11-29
Improvements in or relating to parachutes
ZA723586B
(en )
1973-03-28
Improvement in or relating to electropyrotechnic detonating devices
HK4179A
(en )
1979-01-26
Improvements in and relating to herbicides
KE2678A
(en )
1976-12-10
Improvements in or relating to pipes
ZA723068B
(en )
1973-02-28
Improvements in or relating to wellpoints
HK50378A
(en )
1978-09-15
Improvements in and relating to cameras
ZA711887B
(en )
1972-05-31
Improvements in and relating to the recovery of copper
ZA728111B
(en )
1974-06-26
Improvements in and relating to explosive compositions
KE2660A
(en )
1976-10-01
Improvements in and relating to the production of benzylpyrimidines
ZA724225B
(en )
1973-03-28
Improvements in and relating to adhesives
ZA728410B
(en )
1973-07-25
Improvements in or relating to gelatin
HK45777A
(en )
1977-09-16
Improvements in or relating to magnetic devices
HK10277A
(en )
1977-03-04
Improvements in and relating to pyrotechnic devices
MY7700193A
(en )
1977-12-31
Improvements in and relating to line-throwing rockets
ZA724648B
(en )
1973-04-25
Improvements in or relating to pipes
ZA728010B
(en )
1973-07-25
Improvements in and relating to tiles
HK81576A
(en )
1977-01-07
Improvements in or relating to cameras
ZA725075B
(en )
1973-04-25
Improvements in and relating to keys