Bizarre Patents
Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 4882745 | Cordless headset telephone Cordless headset telephone system including at least one headset having at least one earpiece, a swingout microphone and a headset transmitter and receiver connected to a common antenna, at least one base having a base transmitter and receiver having a co... | 11/21/1989 |
| 4833726 | Helmet with two-way radio communication faculty A helmet with two-way radio communication faculty including a cap-like outer shell made of hard and electrically insulating plastic material, a cap-like shock absorbing member arranged within the outer shell, an ear-pad member secured to one side edge of ... | 05/23/1989 |
| 4788724 | Motorcycle helmet microphone mount and plug mount A microphone mount and plug mount for attaching to the side of a motorcyclist's helmet, said microphone mount adapted to secure a microphone boom positioning a microphone proximate the motorcyclist's mouth, the motorcycle mount characterized by a clamp po... | 12/06/1988 |
| 4682363 | Amphibious personal audio system An amphibious personal audio system is provided. The system includes a band for encircling a person's end. An audio device is secured to the band for generating an audio signal. The audio device is hermetically sealed. Speakers are electrically coupled to... | 07/21/1987 |
| 4654883 | Radio transmitter and receiver device having a headset with speaker and microphone A radio transmitter and receiver device in which a head band has a transmitting microphone at one end and a receiving speaker at the other end. This microphone comprises a bone transmission type microphone for detecting aural oscillation of an external au... | 03/31/1987 |
| 4621372 | Dual communication headset A headset for communication with both FM and AM circuit signals comprising a first earphone for receiving only FM signals and a second earphone for receiving only AM signals and first and second switches associated with the headset and coupled to the FM a... | 11/04/1986 |
| 4620068 | Communication headset An earphone for a wireless communication system having a transceiver unit for converting electrical signals to audio signals and coupling the audio signals through the earphone includes a shallow cup that has a communication passage between the exterior a... | 10/28/1986 |
| 4558178 | Wireless telephone apparatus including both a telephone handset and a telephone headset A wireless telephone apparatus is disclosed which includes an acoustic transmission apparatus employing a telephone handset for use during a normal telephone conversation mode and a telephone headset for use during a hands-free telephone conversation mode... | 12/10/1985 |
| 4484029 | Cordless telephone switch and line selector In a cordless, head mounted telephone set a means of powering the radio transmission and reception unit and selecting telephone lines is provided by ganging the power and selecting switch thereof to the rotation of the microphone mouth piece.... | 11/20/1984 |
| 4357711 | Two way radio safety helmet A 43 channel citizens band radio motorcycle safety helmet, including a helmet shell having a removable front windshield, and containing a C.B. radio, a pair of earphones, a microphone and a control console, the earphones being selectively movable in posit... | 11/02/1982 |
| 4152553 | Protective helmet with voice communication system An improved protective helmet of the type including a two-way voice controlled communication system having electronic transmitting and receiving circuitry. When incoming signals are received by the voice communication system, a transducer vibrates a rigid... | 05/01/1979 |
| 4039999 | Communication system Amplitude modulation systems for underwater communication have a number of disadvantages. For example, with a number of divers attempting to communicate simultaneously, intolerable cross-talk occurs. Variable tuning is necessary to overcome this problem. ... | 08/02/1977 |
| 4017797 | Headset for receiving and transmitting signals The present invention provides a two-way sound transducer system, including amplification circuitry within an ear-muff type attenuator, to enable the user to listen to principally voice communications (although other forms of sound can be transmitted) fro... | 04/12/1977 |
