Herbert Haddan & Co.

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Herbert Haddan & Co. was a British patent agent firm which gave its address as 18, Buckingham St., Strand, W.C., London, in 1896;[1] and 31 & 32 Bedford St, Strand, W.C., London.[2]

The founder must have been Herbert John Haddan, who also patented in the aero field.

Reginald Haddan also filed patents for this firm ; might have been Herbert's son.

Seems disproportionately associated with patents about ballonets.

Patents for which Herbert Haddan & Co. or Herbert Haddan or Reginald Haddan was the patent agent

References