|
CA2094058A1
|
|
Tubular level instrument and method of construction
|
|
US5339530A
|
|
Hand level instrument with composite metal and plastic body
|
|
US5279041A
|
|
Level straight-edge apparatus and method of construction
|
|
US4979310A
|
|
Composite level including an indexing system for aligning the frame with the cover plates
|
|
US4599806A
|
|
Carpenter's square and protractor
|
|
US4571845A
|
|
Polycast level instruments with means for retaining level vials therein
|
|
US4559714A
|
|
Pitch measuring apparatus
|
|
US4419833A
|
|
Composite level construction
|
|
US5003699A
|
|
Level vial with extender pitch range
|
|
CA1184026A
|
|
Pitch measuring apparatus
|
