4. Static structures (e.g., buildings)
  5. Shaped or strengthened by fluid pressure
  6. Fluid pressure is subatmospheric

David A. Black

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Baby stroller forward frame

Transportation – Perambulator – invalid chair – or stretcher – Element or attachment
Design Patent

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Baby stroller with interchangeable front wheel support...

Land vehicles – Wheeled – Stable vehicles – handle-propelled
Reexamination Certificate

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Pressurized waterstops

Static structures (e.g. – buildings) – Shaped or strengthened by fluid pressure – Fluid pressure is subatmospheric
Patent

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Profile ID: LFUS-PAI-P-1570689

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