|
GB854080A
|
|
Improvements in or relating to annular flexible plates for expansion joints
|
|
US2877744A
|
|
Fountain pen of the ball point type
|
|
US2871885A
|
|
Expansion joints and plates therefor
|
|
US2775956A
|
|
Fountain pen of the ball point type
|
|
US1786506A
|
|
Expansion joint
|
|
US1481741A
|
|
Method of manufacturing piston rings
|
|
US1332573A
|
|
Ring-tensioning apparatus
|
|
US1341671A
|
|
Apparatus for manufacturing piston-rings
|
|
US1332572A
|
|
Manufacture of metal packing-rings
|
|
US1332571A
|
|
Ring-gage
|
|
US1332570A
|
|
Ring-gaging instrument
|
