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- File:Patent-US-1762103.pdf + (1762103)
- File:Patent-US-1762104.pdf + (1762104)
- File:Patent-DE-1763291U.pdf + (1763291U)
- File:Patent-AT-176469.pdf + (176469)
- File:Patent-DE-176702.pdf + (176702)
- File:Patent-US-1767189.pdf + (1767189)
- File:Patent-US-1772000.pdf + (1772000)
- File:Patent-US-1772608.pdf + (1772608)
- File:Patent-US-1773475.pdf + (1773475)
- File:Patent-US-1775068.pdf + (1775068)
- File:Patent-US-1776384.pdf + (1776384)
- File:Patent-US-1777736.pdf + (1777736)
- File:Patent-US-1779836.pdf + (1779836)
- File:Patent-US-1780527.pdf + (1780527)
- File:Patent-US-1782108.pdf + (1782108)
- File:Patent-US-1782109.pdf + (1782109)
- File:Patent-US-1782597.pdf + (1782597)
- File:Patent-US-1783630.pdf + (1783630)
- File:Patent-US-1783681.pdf + (1783681)
- File:Patent-US-1783734.pdf + (1783734)
- File:Patent-US-1784078.pdf + (1784078)
- File:Patent-DE-1786449.pdf + (1786449)
- File:Patent-US-1787406.pdf + (1787406)
- File:Patent-US-1789522.pdf + (1789522)
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- File:Patent-US-1798046.pdf + (1798046)
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- File:Patent-US-1809985.pdf + (1809985)
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- File:Patent-GB-190502671.pdf + (190502671)
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- File:Patent-GB-190515547.pdf + (190515547)
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- File:Patent-US-1907626.pdf + (1907626)
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