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| Patents for Bernard H. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,859,665 | Nov. 11, 1958 | F.E. Birch, B.H. Johnson | Apparatus for Relieving Portions of the Thread Flanks of Double Enveloping Worm Elements | metal relieving attachments | |
| 2,978,843 | Apr. 11, 1961 | B.H. Johnson, F.E. Birtch | Apparatus for Grinding Double-Enveloping Worm Elements | gear grinding machines | |
| 4,534,684 | Aug. 13, 1985 | B.H. Johnson | Apparatus For Milling A Gear For A Double Enveloping Worm Gear Drive | ||