Any info on this vintage carpet extractor?

[beagledad]

I saw this on Marketplace today and couldn't find any info on Google. I've never really seen one like it. Especially that very wide nozzle piece.

 

[paul]

Invented by Fred E. Hays in 1964

I did some online research and discovered these (there were later newspaper ads, too):

1-3. US Patent filed in 1964 (usually indicates the beginning of production) & granted in 1966
4. CA & US trademarks (March 25, 1969 OFFICIAL GAZETTE OF THE USPO)
5-6. 1966 Apr 11 PRESS-COURIER ad (US; too large to fit in one screen shot)
7. 1969 Nov 17 THE BULLETIN ad (US)
8. 1974 Aug 8 THE SOUTH SHORE NEWS ad (CA)

The company is still in business. https://deepsteamcleaners.com