Screw drive

References

1. ^ .
2. ^.
3. ^ 83. ISSN 0032-4558. Archived from the original on 2017-02-16.
4. ^
5. ^ . New York: Random House. p. 174. ISBN .
6. ^ . Audiocraft Magazine: 7. April 1956. Archived(PDF) from the original on 2021-10-16.
7. ^.
8. ^ With close-up illustration of Phillips and Pozidriv screw heads.
9. ^.
10. ^ (27th ed.). Industrial Press, Inc. 2004. p. 1596. Archived from the original(PDF) on 8 September 2017 2017.
11. ^ .
12. ^
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16. ^ . v8register. Archived(PDF) from the original on 2016-04-09.
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23. ^ .
24. ^ .
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43. ^ filed 1967-03-21
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51. ^
52. ^
53. ^
54. ^
55. ^
56. ^.
57. ^
58. ^ Archived 2020-10-31 at the Wayback Machine
59. ^ With illustration of PlusMinus screw and screwdriver head.
60. ^.
61. ^.
62. ^ 2022.
63. ^ 2023.
64. ^
65. ^.
66. ^.
67. ^.
68. ^ 2024.
69. ^ 2024. A typical commercial Web site offering security bits.
70. ^.
71. ^ .
72. ^.
73. ^
74. ^
75. ^.
76. ^.
77. ^. The keyway is licensed and private for each user (Current KeyRex pageArchived 2019-02-12 at the Wayback Machine)
78. ^.
79. ^.
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81. ^.
82. ^ . Archived(PDF) from the original on 2021-06-26.
83. ^.
84. ^.
85. ^.
86. ^ . moodytools.com. Archived(PDF) from the original on 2014-01-09.
87. ^ 2017.
88. ^ 2017.
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93. ^.