Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
B28D1/06—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with reciprocating saw-blades
B28D1/064—Sawing grooves in walls; portable sawing machines
Verfahren und Vorrichtung zur Betätigung eines elektrischen Schalters zum Ein- und Ausschalten eines Bildverstärkergerätes, insbesondere einer Bildverstärkerbrille