4. Stone working
  5. Tools

Roy J. Walters

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Device for removing stains

Stone working – Tools
Patent

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Device for removing stains from swimming pool walls and concrete

Abrading – Tool support for flexible-member tool – Manually manipulated
Patent

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Device for removing stains from swimming pool walls and...

Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Reexamination Certificate

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Method of cleaning tile grout

Abrading – Abrading process
Reexamination Certificate

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Method of cleaning tile grout

Cleaning and liquid contact with solids – Processes – Carbon removal
Reexamination Certificate

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Profile ID: LFUS-PAI-P-724602

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