Engineering Drawings - Legend OCR

Hi, I scan hundreds of technical/engineering drawings but acrobat will not OCR oversized documents. Every drawing has a legend in the bottom right corner of every drawing which contains a unique drawing number and it's version number, I want to be able to OCR the legend on thousands of technical drawings with just the legend section OCR'd so that I can then keyword search our legacy pdf drawings and OCR legends on any new scanned documents. Does anyone know how to do this, currently I can batch scan A4/A3 documens and then keyword search after indexing files on Windows 7 and use the Windows 7 search function very effectively.
I have Acrobat X Standard and use a OCE Colourwave 300 Plotter with Adobe postscript.
Here is an example legend from an A0 pdf
Many thanks for any help with this, a google search on this specific query gave only 3 non-connected results!
Marcus

Scan to a smaller page size.
Heck ANSI C will be more than large enough.
Avoid scan workflows that use lossy compression.
Use 300 ppi for resolution.
Scan to black and white (no grayscale, no color).
Your file sizes will be more manageable.
You'll be able to use Acrobat to OCR.
Use an Acrobat create PDF from scanner preset which will hold the desired configurations.
If desired OCR of the PDF can be part of the create PDF workflow.
Or, once you have some PDFs run an Action from Acrobat to batch OCR several PDFs at one time.
Be well...

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