OT: patent diagrams

Wood engravings??? Where? Which patent(s)?

Maybe, whoever wrote the application? ?:-/

Good Luck! Rich

martin,

They're not wood engravings -- though I appreciate that description. They were required to be India ink on a special type of vellum. It was a highly specialized type of drafting. But it's no longer required by the US Patent Office. Hasn't been required for several years now.

--Mike

Thanks Mike, I vaguely remember that the UK registrar of births marrages and deaths still use a carbon based ink that will last several centuries

Maxtor/Seagate, are you listening?

martin

The majority pf patent drawings are "outsourced" to professional patent draftsmen.

So the ink is OK, but the base (paper) will not last as long; the US Constitution is a case in point...