GB2109840B
(en )
1983-11-02
Improvements in or relating to underwater mining
HK37782A
(en )
1982-09-03
Improvements in or relating to wall segments
EP0018014A3
(en )
1980-11-26
Improvements in or relating to formwork
ZA787058B
(en )
1979-11-28
Improvements in or relating to plansifters
DE2962987D1
(en )
1982-07-22
Improvements in or relating to joints
ZA786956B
(en )
1980-03-26
Improvements in or relating to clotheslines
PH15678A
(en )
1983-03-11
Improvements in or relating to pyrazinobenzodiazepines
DE2965527D1
(en )
1983-07-07
Improvements in or relating to gaskets
ZA791901B
(en )
1980-07-30
Improvements in or relating to mine working apparatus
HK43883A
(en )
1983-10-28
Improvements in or relating to building blocks
ZA786869B
(en )
1980-03-26
Improvements in or relating to scaffolding
ZA782842B
(en )
1979-07-25
Improvements in or relating to building apparatus
ZA79541B
(en )
1980-03-26
Improvements in or relating to drums
ZA787331B
(en )
1980-11-26
Improvements in or relating to props for mine supports
ZA785859B
(en )
1980-08-27
Improvements in or relating to props
DE2861017D1
(en )
1981-11-26
Improvements in or relating to decollators
MY8200105A
(en )
1982-12-31
Improvements in or relating to dredges
PH14986A
(en )
1982-03-05
Improvements in or relating to bromination processes
ZA784208B
(en )
1979-07-25
Improvements in or relating to footwear
GB2097136B
(en )
1983-02-23
Improvements in or relating to cameras
ZA784347B
(en )
1979-09-26
Improvements in or relating to signwriting
ZA781975B
(en )
1979-06-27
Improvements in or relating to splints
HK60584A
(en )
1984-08-10
Improvements in or relating to picture-making boards
ZA775919B
(en )
1978-10-25
Improvements in or relating to building
ZA78648B
(en )
1979-06-27
Improvements in or relating to building construction