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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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US Patent 4334315 - Wireless transmitting and receiving systems including ear microphones
US Patent Issued on June 8, 1982
Estimated Patent Expiration Date:
May 5, 2000Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
May 5, 2000Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA wireless transmitting and receiving system includes an ear microphone of the vibration pick-up type for picking up bone-conducted voice signals through an external auditory ear canal wall of a wearer. A portable case is disposed adjacent the wearer's ear and a wireless device is attached adjacent the wearer but spaced from the portable case. A transmitter of a transmitting circuit for transmitting the output signals of the ear microphone is housed in the portable case. A receiver of a receiving circuit is housed in the wireless device and receives signals from outside the system. The transmitting and receiving circuits provide a wireless connection between the portable case and the wireless device permitting two-way communication through one ear of the wearer. | InventorsAssigneeApplicationNo. 06/146675 filed on 05/05/1980US Classes:455/11.1, Portable or mobile repeater128/201.19, Means for transmitting, or facilitating, voice communication from face mask, hood, or helmet381/151, Body contact wave transfer (e.g., bone conduction earphone, larynx microphone)381/315, Remote control, wireless, or alarm381/326, Non-air-conducted sound delivery455/100, Body attached or connected455/351, Transportable455/41.1Near field (i.e., inductive or capacitive coupling)Field of Search455/7, CARRIER WAVE REPEATER OR RELAY SYSTEM (I.E., RETRANSMISSION OF SAME INFORMATION)455/100Body attached or connectedExaminersPrimary: Ng, Jin F.Attorney, Agent or FirmUS Patent References2535063, 3258533, 3819860, 3868572, 3869584, 4150262Piezoelectric bone conductive in ear voice sounds transmitting and receiving apparatusIssued on: 04/17/1979 Inventor: Ono International ClassesH04B 7/14 (20060101)H04B 1/38 (20060101) H04B 5/00 (20060101) H04R 1/46 (20060101) H04R 1/00 (20060101) H04R 1/08 (20060101) H04R 1/10 (20060101) H04R 17/02 (20060101) Foreign Application Priority Data1979-05-04 JP |
