Katharine Blackman
Katharine Blackman's California Architect stamp
Watermarked specimen
This downloadable California Architect stamp specimen was generated for Katharine Blackman from the public license details in this directory listing, including license number C 41831. The preview is watermarked and does not prove that Katharine Blackman approved or sealed a document.
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Katharine Blackman is a licensed Architect in California. The credential is registered under license number C 41831 and is currently active. It has been on record since 2025. Licensure is issued and verifiable through the California Board for Professional Engineers, Land Surveyors, and Geologists.