Phillips & Brooks, Inc.

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
D309160 Advertising frame for pay telephoneExpiredOct 16, 86Jul 10, 90[]
4862499 Deformable membrane keypad assembly for public telephonesExpiredSep 04, 87Aug 29, 89[H01H]
4747134 Pay telephone hook switch assemblyExpiredJun 04, 87May 24, 88[H04M, H01H]

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