Subseries 1: previous hit Brush next hit Laboratories Company, 1921-1954

Box 29 / Folder 8
Audit, 1927


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Box 29 / Folder 9
Building Lease, 1921


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Box 29 / Folder 10
Chemical Rubber Company. Purchase Orders and Invoices, 1922


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Box 29 / Folder 11
Confidentiality Agreements. Beryllium Experiments, 1932


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Box 29 / Folder 12
Employees, 1921-1933


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Box 29 / Folder 13
Hoopes Aluminum Refining Process, 1933


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Box 29 / Folder 14
License Agreements, 1923-1924


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Box 29 / Folder 15
Patent Transfers, 1923-1930


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Box 29 / Folder 16
Piezo Electrical Crystals, 1926-1933


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Box 29 / Folder 17
Stock Agreements, 1923-1925


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Box 29 / Folder 18
United Machine and Manufacturing Company, 1923-1924


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