| Patents for Penrose E. Chapman |
Patents 1 -
10
of 29
      |
| Picture | Number | Date | Patentee | Title |
| | 706,798 | Aug. 12, 1902 | P.E. Chapman | Electric testing apparatus |
 | 731,857 | Jun. 23, 1903 | P.E. Chapman | Electric motor |
 | 733,149 | Jul. 07, 1903 | P.E. Chapman | Method of changing the frequency of single-phase induction-motors |
 | 822,186 | May 29, 1906 | P.E. Chapman | Elevator safety-alarm |
 | 874,163 | Dec. 17, 1907 | P.E. Chapman | Armature-winding machine |
 | 1,121,798 | Dec. 22, 1914 | P.E. Chapman | Drum-armature-winding machine |
| | 1,312,610 | Aug. 12, 1919 | P.E. Chapman, R.H. Robinson | Variably pitched and actuated bell |
 | 1,351,230 | Aug. 31, 1920 | P.E. Chapman | Armature and coil winding machine |
 | 1,396,728 | Nov. 15, 1921 | P.E. Chapman | Unreeling and tension device |
| | 1,500,181 | Jul. 08, 1924 | P.E. Chapman | Armature and coil winding machine |
