|
US2256864A
|
|
Sealing composition
|
|
US2142584A
|
|
Insulating material in gel form
|
|
US2100387A
|
|
Product for covering highway joints
|
|
US1823974A
|
|
Jointing element for pipe and other tubular members
|
|
US1878625A
|
|
Asphaltic cement
|
|
US1814678A
|
|
Methods of joining bell and spigot pipes
|
|
US1662603A
|
|
Pipe-jointing element
|
|
US1615008A
|
|
Pipe-jointing apparatus
|
|
US1608470A
|
|
Pipe-jointing element
|
|
US1549078A
|
|
Segmental tile structure
|
|
US1572197A
|
|
Series of sewers or conduits
|
|
US1380200A
|
|
Apparatus for purifying and disposing of sewage
|
|
US1224913A
|
|
Septic tank.
|
|
US1209693A
|
|
Reinforced sewer construction.
|
|
US1190226A
|
|
Building-block.
|
|
CA132218A
|
|
Account register
|
|
CA414382A
|
|
Window sealing composition
|
|
CA233938A
|
|
Series of sewers
|
