US Patent 4640382 - Page 3 Image - Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser

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Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser

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Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser - US Patent 4640382 - Page 1

Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser - US Patent 4640382 - Page 2

Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser - US Patent 4640382 - Page 3

Page 3

Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser - US Patent 4640382 - Page 4

Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser - US Patent 4640382 - Page 5

Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser - US Patent 4640382 - Page 6

Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser - US Patent 4640382 - Page 3

Patent US4640382 Page 3 of 7


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