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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 7337946 | Device for resolving interpersonal relationship issues A device for resolving interpersonal relationship issues comprising: (a) a plurality of text sheets comprised of flexible, transparent material; (b) a rigid front cover; and (c) a rigid back cover; wherein each text sheet comprises an opaque band bearing text on eit... | 03/04/2008 |
| 7044919 | Test methods, devices and test kits A method for determining the time of maximum fertility in the mammalian ovulation cycle, for the purpose of assisting conception, wherein testing is conducted over a period of days in the current ovulation cycle on samples of body fluid obtained from an individual h... | 05/16/2006 |
| 6769602 | Feto-maternal calendar calculator A feto-maternal calendar calculator (10) provides for calculating the gestational age of a fetus from the calendar date of the mother's last menstrual cycle. Using the calculated gestational age, the user of the calendar calcalator may determine appropriate g... | 08/03/2004 |
| 5310994 | Fertility period calculator A fertility period calculator especially suited for third world countries, non-complex in operation, having two rotatable disks that require identification of numerals representing the days of the month and the average number of days in the user's menstru... | 05/10/1994 |
| 4960980 | Bioclock calculating device for human body A new type of bioclock calculating device for the human body comprising a ring, a set of discs and some accessories. They are marked with data graduation, age graduation and curves showing the cycles of physical, emotional and intellectual (PEI) rhythms. ... | 10/02/1990 |
| 4752674 | Calculator used for displaying ovulation synchronization of donors and recipients in embryo transfer procedures A calculator used for displaying menstrual cycle synchronization of donors and recipients during embryo transfer procedures includes first, second and third members aligned with one another. In accordance with a preferred embodiment, the first member is a... | 06/21/1988 |
| 4737619 | Fertility calculator There is disclosed a calculator adapted to determine optimum fertility time periods for a female, formed by a first scale divided into 365 equal units, each unit assigned a day for each month of a full calendar year, a second scale positioned in operative... | 04/12/1988 |
| 4625099 | Fertility calculator There is disclosed a calculator adapted to determine optimum monthly fertility time periods of a female formed by a first scale divided into 365 equal units, each unit assigned a day and each month of a full calendar year, a second scale positioned in ope... | 11/25/1986 |
| 4454409 | Bra-size calculator A convenient, easy-to-use calculator computes a person's proper bra and cup size given a knowledge of that person's chest, overbust, and band measurements. The calculator comprises a circular slide rule of three superimposed disks, the intermediate disk b... | 06/12/1984 |
| 4350878 | Conception control calendar A calculating device is provided to aid in predicting the periods of fertility and non-fertility during a menstrual cycle of a user. The device includes a first disc having indicia thereon representing the calender days of the present month and the next m... | 09/21/1982 |
| 4232215 | Human reproduction indexing device A human reproduction indexing device for indicating the calendar dates for days of a menstrual cycle on which the probability of conception is the greatest includes a generally circular base member having indicia representing the calendar dates for the da... | 11/04/1980 |
| 4035616 | Device for the joint evaluation of several cyclic processes Several transparent elements showing periodically-varying curves and a transparent element showing a date scale are superposed over each other and a ground element which shows a number of year scales of different length, subdivided from 0 to 100 years. Th... | 07/12/1977 |
