Unknown Slide Rule “A&C”

Data:

• Pocket slide rule with a wooden core and surfaces in Celluloid.
• On the back of the slide there is a logo “A&C”

Questions:

• Maker?
  The pins look like those on a Thornton.
  What about the corrugated wood? Andries de Man
  The scales also seem corrugated? Peter Hopp
   
  
  You might want to download the image of the logo and add it to an image-based query.
  Trademark search: 
  • EUIPO:
  Nice Class 9 (apparatus and instruments for scientific or research purposes, audiovisual and information technology equipment, as well as safety and life-saving equipment)
  Nice Class 16 (… drawing materials … instructional and teaching materials …)
  Vienna class 26.03.01 (one triangle)
  Vienna class 26.03.05 (triangles pointing downward)
  Vienna class 24.09.03 (stylized or fanciful crowns)
  Vienna class 17.05.01 (measures)
  Vienna class 17.05.03 (slide rules, calculating disks and cylinders)
  Vienna class 17.05.05 (gauges, calipers, vernier gauges, micrometers)
  Vienna class 17.05.17 (dials of measuring instruments)
  Trademark name starts with A
  Trademark name contains C
  GO!
  • USPTO Trademark Search:
  Goods and Services: instruments
  Design Code: 26.05.32 (plain single line triangles)
  Design Code: 24.11.02 (crowns open at the top)
  Design Code: 17.07.02 (slide rules, abacuses and the like)
  Design Code: 17.07.03 (gauges, including tachometers and speedometers)
  Design Code: 17.07.25 (other measuring instruments and readout lines and charts)
  Combined Mark: A*C*
  Copy this: DC:26.05.02 AND GS:instruments AND CM:A*C* to the input box of USPTO Trademark Search
   
  • WIPO Global Brand Database does not allow external form submissions, so you're on you own!