Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 6867988 | Magnetic logic elements A magnetic logic element for a logic device is described formed by at least one conduit capable of sustaining and propagating a magnetic soliton, the conduit being adapted by the provision of nodes and/or directional changes giving rise to discontinuities in soliton... | 03/15/2005 |
| 6774391 | Magnetic logic element A logic device formed at least one chain of dots of magnetic material. Each dot has a width of 200 nm or less and is spaced at a distance that is sufficiently small to ensure magnetic interaction of adjacent dots. ... | 08/10/2004 |
| 4516222 | Laminated magnetic bubble device Herein disclosed is a laminated magnetic bubble device of a multiple layer structure composed of at least one thin magnetic film having low coercive force and vertically oriented anisotropy which can allow easy generation and erasure of a magnetic bubble,... | 05/07/1985 |
| 4453232 | Device for generating magnetic bubbles with a high bit rate A memory device utilizing magnetic bubbles which are driven by a rotary magnetic field on contiguous disc drive patterns. These disc patterns have mainly a first scale. Each drive pattern also comprises a further disc pattern of a substantially larger sca... | 06/05/1984 |
| 4424577 | Conductorless bubble domain switch A magnetic bubble domain system including a planar layer of magnetic material in which magnetic bubble domains can be propagated; and first and second bubble domain guide structure coupled to the layer and defining respective first and second bubble propa... | 01/03/1984 |
| 4415990 | Complementary bi-level magnetic bubble propagation circuit A bi-level magnetic bubble domain propagation structure in which the domain guide structure is formed by a spatially periodic pattern of permalloy implemented on two discrete levels separated by a substantially vertical gap. The structure forms a pattern ... | 11/15/1983 |
| 4415988 | Magnetic bubble memory device A magnetic bubble memory device comprises: a magnetic layer which has a first region having the easy axis of magnetization extending in a certain direction and a second region surrounding said first region and having the easy axis of magnetization substan... | 11/15/1983 |
| 4414647 | Bubble domain replicator for contiguous-disk devices A bubble domain replicator for ion-implanted contiguous disk devices has a cusp portion and a tip portion extending substantially away from the cusp portion so that the cusp forms part of a super track and the tip forms part of a bad track. A hairpin cond... | 11/08/1983 |
| 4403304 | Replicator for ion-implanted bubble domain devices A replicator for a magnetic bubble domain device including a hairpin loop conductor element traversing first and second spaced apart bubble domain guide structures. The replicator functions to replicate a bubble domain travelling along the first bubble pr... | 09/06/1983 |
| 4346454 | Bubble memory with on chip error map storage on permalloy disk elements A bubble memory chip includes a plurality of data loops, some of which may be defective, for storing magnetic bubbles representative of data therein. A serial-parallel input propagation path and a parallel-serial output propagation path are provided for p... | 08/24/1982 |
| 4330848 | Charged wall amorphous magnetic layers Amorphous ferrimagnetic layers are described with support stable and mobile magnetic charged walls. These layers can be used as drive layers in magnetic bubble domain devices, and are characterized by very weak even-fold in-plane anisotropy, or substantia... | 05/18/1982 |
| 4283775 | Contiguous disk bubble storage A bubble storage system using contiguous propagation elements is described using magnetically soft drive layers for movement of the bubble domains in a bubble domain film, in response to the reorientation of a magnetic drive field in the plane of the driv... | 08/11/1981 |
| 4276613 | Close-packed bubble propagation device A close-packed magnetic bubble propagation device includes a pattern having a plurality of propagation elements positioned in at least four adjacent rows. These elements are spaced to provide a period or spacing of bubbles in these rows of less than three... | 06/30/1981 |
| 4264985 | Continuous propagation structures The invention is directed to continuous (gapless) propagation structures for use with magnetic bubble domain devices. The gapless structures are arranged so that magnetic bubbles will propagate therealong without a significant change in size or diameter o... | 04/28/1981 |
| 4253159 | Ion-implanted bubble memory with replicate port A replicator for an ion-implanted magnetic bubble memory includes an offset hairpin geometry. The conductor is associated with features in adjacent bubble paths which exhibit strong attracting poles at the same time. The conductor stretches the bubble bet... | 02/24/1981 |
| 4249249 | Ion-implanted bubble memory A magnetic bubble memory of the G-shaped organization is implemented by ion-implantation. Attractive operating margins are realized by the use of transfer-out arrangements which moves bubbles in parallel first to an auxiliary path and thereafter to the ma... | 02/03/1981 |
| 4236226 | Magnetic domain device A magnetic device comprising at least one thin domain layer of a magnetizable material which has an easy axis of magnetization which is substantially normal to the surface of the layer and in which magnetic domains are propagated under the influence of a ... | 11/25/1980 |
| 4151599 | Magnetic bubble display units In a display unit utilizing magnetic bubbles, selective extinction of the magnetic bubbles in a matrix results in a pattern of letters and/or images which are combinations of the magnetic bubbles as picture elements. The present display unit has in-plane ... | 04/24/1979 |
| 4151602 | Magnetic bubble multilayer arrangement A magnetic bubble device comprising a non-magnetic substrate layer, and a sequence of magnetic layers joined to each other and to the magnetic substrate layer, e.g. by epitaxial growing of crystalline layers, whereby at least two of the magnetic layers ma... | 04/24/1979 |
| 4149267 | Associative memories using magnetic bubbles An associative magnetic domain memory comprising; a predetermined number of storage loops having a predetermined number of magnetic elements on which domains circulate, said domains or absence of said domains on said magnetic elements in said storage loop... | 04/10/1979 |
| 4143420 | Conductor-access, magnetic bubble memory A conductor-access, magnetic bubble memory is realized with a single metallization level for propagation. The familiar undulating or serpentine conductor pattern used for moving bubbles is modified to allow a simple and easily realizable, low power drive ... | 03/06/1979 |
| 4128895 | Magnetic wall assisted bubble domain nucleator An improved magnetic bubble domain nucleator is provided which uses a magnetic wall, such as a charged wall, Neel wall, or Bloch wall, to assist nucleation. In a preferred embodiment, a magnetic charged wall is produced in an ion implanted region of a mag... | 12/05/1978 |
| 4112503 | Stripe domain propagation using contiguous bicore disk file structure An apparatus for and a method of moving stripe domains in a direction transverse their length is disclosed. The apparatus includes a layer of magnetizable material in which stripe domains are capable of being generated, sustained and moved. Formed upon th... | 09/05/1978 |
| 4100608 | Exchange stack buffer memory There is provided a memory system, for example, a magnetic bubble domain memory, which includes an exchange stack buffer memory between a main storage area and other portions of a bubble domain chip organization. The buffer memory includes a plurality of ... | 07/11/1978 |
| 4070658 | Ion implanted bubble propagation structure An improved ion implanted propagation structure for movement of magnetic bubble domains in a storage medium which comprises an additional magnetic layer capable of ion implantation in combination with a bubble domain storage layer in which the bubble doma... | 01/24/1978 |
| 4040019 | Ion implanted magnetic bubble memory device having major and minor rows A magnetic bubble domain memory device employing a major row of contiguous regions for major loop bubble travel and a plurality of minor rows of contiguous regions for minor loop bubble travel, wherein the remainder of the magnetic domain-supporting layer... | 08/02/1977 |
| 4020476 | Magnetic bubble memories with nonobstructing crossings between conductor and permalloy patterns A field-access magnetic bubble memory employs both a pattern of magnetic elements to define paths along which bubbles move in reponse to a magnetic field reorienting in the plane of bubble movement and electrical conductors which, inter alia, control bubb... | 04/26/1977 |
| 4014009 | Magnetic bubble propagate arrangement Improved magnetic bubble memory operation is achieved with an asymmetric half-disc design for a propagate pattern operative to move the bubbles in a "field-access" mode of operation. The pattern ensures the continuous presence of a elongated supportive m... | 03/22/1977 |
| 4012726 | Magnetic bubble replicator An improved magnetic bubble replicator is characterized by relatively high bias and phase margins. Both the orientation of a replicate conductor with respect to a permalloy replicator element and the shape of the replicator element are shown to be importa... | 03/15/1977 |
| 4007447 | Magnetic bubble, field-access memory having offset propagate element design A magnetic bubble, field-access memory with a relatively high packing density is achieved by offsetting the elements of one leg of a recirculating loop with respect to the elements of the other. Beneficial loop turn geometries are allowed also by the offs... | 02/08/1977 |
| 4007453 | Magnetic bubble memory organization A magnetic bubble memory operative in the field-access mode is organized with separate read and write major channels accessing the same plurality of minor loops. The permalloy elements characteristic of field-access bubble memories define a novel swap fun... | 02/08/1977 |
| 4001673 | Method of testing and repairing magnetic bubble domain chip A method of both testing all loops of a long serial magnetic bubble domain chip, and repairing the chip for automatic bypass of defective loops. Each repair station associated with each loop is sequentially loaded with a bubble domain. Then new domains ar... | 01/04/1977 |
| 3996573 | Bubble propagation circuits and formation thereof A magnetic domain memory comprising a planar layer of magnetic material in which magnetic bubbles are moved by a rotating magnetic field in the plane of the layer. At least one circuit or path is provided for guiding the propagation of the bubbles in the ... | 12/07/1976 |
| 3988722 | Single sided, high density bubble domain propagation device A magnetic bubble domain propagation device which is single sided and can be used to move bubble domains in amorphous magnetic films. The propagation structure is comprised of either one or two layers located on a single side of the amorphous magnetic med... | 10/26/1976 |
| 3984823 | Magnetic bubble field-access replicator operative with the drive field in a fixed orientation A field-access bubble replicator operative in the presence of a magnetic field in a fixed orientation in the bubble film is achieved. Bubble stretch and cut pulses are operative to cut and transfer an image of data in the replicator in the presence of the... | 10/05/1976 |
| 3975710 | Character pattern recognition method and apparatus using feature enhanced magnetic domain patterns A character pattern recognition method and apparatus for recognizing an unknown character pattern in accordance with a correlation between the unknown character pattern and each known standard character pattern, in which the unknown character pattern is t... | 08/17/1976 |
| 3971038 | Coercivity control and detection signal generating pattern for uniaxially anisotropic ferromagnetic crystal platelets There is disclosed coercivity control and signal generating and detection means comprising a two-dimensional lattice array of dots of magnetically susceptible material in intimate physical contact with the major plane surface of a uniaxially anisotropic f... | 07/20/1976 |
| 3971037 | Magnetic bubble shift register A digital data storage element using magnetic bubbles, or small cylindrical magnetic domains formed in a thin film of magnetic material, in which binary information is stored by providing two alternative positions for a magnetic bubble, a pattern of high ... | 07/20/1976 |
| 3967002 | Method for making high density magnetic bubble domain system A method for making a high density magnetic bubble domain system including the functions of read, write, storage, transfer, and annihilation. Only three masking steps are required, of which only one requires critical alignment. The proces makes use of the... | 06/29/1976 |
| 3936883 | Magnetic bubble read/write head Magnetic bubbles are employed to write and read digitized signals of audio, video and digital data in a magnetic medium, while circumventing the problems associated with high linear tape speed or rotary head motion. Writing is accomplished via the interac... | 02/03/1976 |
