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| Patents for Harry Alfred Pearn | |||||
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| Picture | Number | Date | Patentee | Title | |
 | GB-259,064 | Oct. 07, 1926 | H.A. Pearn | Improvements relating to boring and facing machines | |
 | GB-261,551 | Nov. 25, 1926 | H.A. Pearn | Improvements relating to boring and facing machines | |
 | GB-275,419 | Aug. 11, 1927 | H.A. Pearn | Improvements relating to boring and facing machines | |
 | GB-328,475 | May 01, 1930 | H.A. Pearn | Improvements relating to horizontal boring and facing machines | |