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| Patents for E04G 23 - Working measures on existing buildings (7,015) |
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| 03/01/1977 | US4009908 Carpet and tile stripper | | 12/28/1976 | US3999483 Removing coatings from pipe | | 12/28/1976 | US3999347 Handy helper | | 12/21/1976 | US3998201 Concrete breaker | | 12/07/1976 | US3995404 Attachment for hollow walls and method of repairing same | | 11/30/1976 | US3994057 Impact tool for installing dormers | | 10/19/1976 | US3986243 Method of repairing chemical process equipment | | 09/14/1976 | US3980341 Breaking up of concrete surface layers or the like | | 08/10/1976 | US3973315 Demolition tool | | 06/29/1976 | US3965624 Room ceiling construction with recessed dome mounted therein and the method of mounting the same | | 06/08/1976 | US3961565 Piston and cylinder assembly | | 06/01/1976 | US3960082 Down-the-hole device for breaking rock, concrete and reinforced concrete by pulsewize high liquid pressure | | 02/10/1976 | US3936988 Repair device for restoring a damage dry wall board | | 01/27/1976 | US3935355 Wrapping material | | 01/13/1976 | US3931997 Method for breaking concrete structures |
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