Bizarre Patents
Ballistic resistant body covering
A ballistic resistant body covering for protecting the torso, groin and neck area from ballistic missiles.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4739511 | Hearing aid A hearing aid having a comparator or comparators which compare speech sound signals obtained by a first transducer with reference voltage(s) as slice level(s) formed from a standard voltage and which output time series square wave containing frequency inf... | 04/19/1988 |
| 4519399 | Method for measuring the degree of nasality A method of measuring the degree of nasality in human voice sounds by independently isolating and measuring without leakage the exhaled air flow rate through the nose and the exhaled air flow rate through the mouth of a person resulting from the utterance... | 05/28/1985 |
| 4490585 | Hearing aid A hearing aid is made up of an automatic filter circuit for transmitting an input signal in a predetermined characteristic, and a low frequency component detecting circuit for detecting the low frequency component of the input signal, to change the charac... | 12/25/1984 |
| 4489330 | Electromagnetic induction coil antenna The invention relates to an electromagnetic induction coil or antenna device embedded in hearing aids or radio sets for receiving sound signals or carrier signals generated by a primary electromagnetic induction coil which is laid down in the room. A plur... | 12/18/1984 |
| 4475230 | Hearing aid In a hearing aid, when the input sound pressure to the microphone exceeds a preset level for a preset period of time, a control signal is produced to automatically decrease the maximum output sound level, thereby decreasing the overload to the user.... | 10/02/1984 |
| 4361733 | Hard-of-hearing aid appliance A hearing aid appliance has induction loops which are magnetically coupled to hearing aids held individually by hard-of-hearing persons. The number of induction loops is an integral multiple of two, and each induction loop is in the form of a rectangle ha... | 11/30/1982 |
| 4354061 | Sensing coil in hearing aid A sensing coil unit for a hearing aid is made up of a sensing coil which is in the form of a cylinder one end of which is heavier than the other end and is floated in the liquid in a sealed container, so that the sensing coil is vertical at all times irre... | 10/12/1982 |
