I can find references to 2 old British patents, but cannot locate them anywhere online. Could anyone assist?

Many Thanks.


First is 25306/51. a relevant date appears to be 30Oct1951.

Second is 7523/52

The applicant may be Francis or Frank Whitehead. The assignee may be Milner Ltd; or Chatwood Milner Ltd. They relate to combination locks.

  • Those numbers seem to be application numbers not patent numbers. Do you have any other numbers? A GB patent number in 1951 would be in the 600,000 to 750,000 range.
    – George White
    Jun 6 at 17:59
  • I can't find any Francis or Frank Whiteheads among British patents. Can you relate where you are getting the names of inventor, assignee and document numbers?
    – Eric S
    Jun 6 at 23:07
  • The date and numbers were not helpful in finding any documents. Are you confident there are two GB patents?
    – George White
    Jun 7 at 0:55

1 Answer 1


There is a U.S. patent Combination lock US 276,6606 with inventor Frank Whitehead assigned to Milner Safe Co Ltd.

It claims priority from a British application GB1428952A filed June 6, 1952. That application resulted in GB761432 Improvements in or relating to locks

It doesn’t look like any of the numbers or dates in the question are related to those documents.

From the GB provisional application -

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