Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8100452 | Scoop for bagging sand A scoop for filling bags has a channel shaped member open at its forward and rear ends with an open top extending through forward and rear portions between the forward and rear ends. The forward portion has a flat bottom with two sides tapering inward from the front... | 01/24/2012 |
| 7767947 | Semiconductor light source with optical feedback A semiconductor light source with optical feedback includes a vertical member extending upward from an upper horizontal surface of a header parallel to a vertical beam projected from a semiconductor light-emitting element mounted on the horizontal surface of the hea... | 08/03/2010 |
| 7065516 | Data checker apparatus and method In a data checking system and method for an educational management system, lists of various possible areas for data entries are displayed for a user to select the areas for which data entry is necessary. Upon request, the user can request a check of a data base of t... | 06/20/2006 |
| 7012402 | Battery charging control A wireless microphone is provided with a recharging circuit which determines if a battery in the microphone is a rechargeable type and can be safely recharged. The recharging circuitry in the microphone, which could also be included in other handheld wireless device... | 03/14/2006 |
| 6810125 | Microphone emulation An emulation circuit includes a digital signal processor with a digital filter controlled by frequency response conversion parameters for converting a standard microphone signal into a signal emulating the frequency response of one of a plurality of microphones sele... | 10/26/2004 |
| 6601464 | Particle momentum sensor A particle momentum detector has a massive support with a flat surface on which is mounted a piezoelectric member supporting a flat low mass plate resistant to deformation by impinging particles. The low mass plate has a rigidity suppressing multiple mode... | 08/05/2003 |
| 6548987 | Holder for recharging a wireless microphone A holder for a wireless microphone includes a pair of terminals electrically connected to a power supply and mounted in a recess of a holder member for engaging corresponding terminals on an elongated handle body of the wireless microphone. In one embodim... | 04/15/2003 |
| 6468085 | Scale builder and method In a scale building system and method for an educational management system, education goals are added to lists of different knowledge areas for enabling a teacher or administrator to tailor the assessment of student achievement. As each goal is added, the... | 10/22/2002 |
| 6470449 | Time-stamped tamper-proof data storage A computer diary archives a diary entry by creating, time stamping, authenticating and permanently storing a reference data block along with each diary entry. An archived diary entry can only be modified by placing original text within compartment codes, ... | 10/22/2002 |
| 6442691 | Authenticated time device A computer diary archives a diary entry by creating, time stamping, authenticating and permanently storing a reference data block along with each diary entry. An archived diary entry can only be modified by placing original text within compartment codes, ... | 08/27/2002 |
| 6322366 | Instructional management system An education management system designed primarily for preschool and beginning elementary grade levels employs learning capabilities which have assigned difficulty and discrimination factors. The learning capabilities for each developmental or grade level ... | 11/27/2001 |
| 6070798 | Purchaser generated transaction recording and negotiable instrument payment system A seller's computer system, accessible by a customer's computer over the internet for ordering products, includes a product information unit, a purchase transaction information entry and verification unit; a transaction information storage unit, a transac... | 06/06/2000 |
| 6032863 | Method and apparatus for producing machine readable bar code A machine readable bar code is formed from a bar code datum by generating a first bar code image section encoding the bar code datum by a horizontal arrangement of first vertical bar sections separated by first vertical space sections wherein the first ve... | 03/07/2000 |
| 5900571 | Two dimensional musical instrument with three-quarter steps along one dimension A musical instrument includes a two-dimension array of note producing elements wherein the elements along one dimension of the array have three-quarter steps or increasing fundamental frequencies Fn according to the equation Fn =F | 05/04/1999 |
| 5821889 | Automatic clip level adjustment for digital processing The magnitude of analog audio input signal to an analog to digital converter in a digital audio processing system is increased or decreased in response to the magnitude of a sample of the digitized audio signal being found below or above, respectively, an... | 10/13/1998 |
| 5796481 | Suspended particle concentration monitor A suspended particle concentration monitor includes near and far detector circuits with near and far elements sensing scattered visible or near infrared radiation projected into a fluid volume in which particle concentration is determined. The spacing and... | 08/18/1998 |
| 5786882 | Retainer for spectacles A retainer for spectacles has slots formed horizontally from front edges in flat plastic depending rear ends or tips of temples hinged on opposite sides of a double eyeglass frame for receiving and retaining opposite end portions of an elastic band extend... | 07/28/1998 |
| 5704473 | Music strings and packaging A metal musical string having a plastic or polymer material covering an end of the string opposite to a ball end of the string is contained in a flexible enclosure or pouch. In a coiled configuration, the ends of the string are twisted around convolutions... | 01/06/1998 |
| 5577571 | Automobile chassis with pivoted inner and outer frames A chassis for an automobile has inner and outer frames pivotally connected together intermediate front and rear ends of the frames. The inner frame is connected directly to a rear end without resilient suspension and supports a motor driving a differentia... | 11/26/1996 |
| 5506910 | Automatic equalizer An automatic equalizer sequentially adds subdued narrow band audio reference signals of different frequencies to an audio program signal being broadcast, and measures the magnitude of each successive broadcast reference signal to determine a measured freq... | 04/09/1996 |
| 5490478 | Animal hammock An animal hammock includes a rectangular cloth body 20 folded at a transverse midline 22 to form halves 24 and 26. Diagonal gussets 28 and 30 are stitched at the corners extending from the open sides to the fold axis 22 to form a pocket 32 into which a sm... | 02/13/1996 |
| 5440648 | High speed defect detection apparatus having defect detection circuits mounted in the camera housing A defect detection system includes a video camera with defect detection circuits for detecting defects in video signals being outputted by corresponding sections of an array sensor such as a TDI CCD two-dimensional array sensor. Each defect detection circ... | 08/08/1995 |
| 5404788 | Musical instrument with keyboard A keyboard for a musical instrument based on a twelve note per octave scale has keys on at least two playing rows, including a front playing row and a rear playing row. The front playing row includes keys for the notes "D.music-flat.", "E.music-flat.", "F... | 04/11/1995 |
| 5396827 | Tuner with variable tuning window An electronic tuning device has selectable width tuning ranges wherein selected pairs of the LEDs in a single row of LED's are activated, such as being turned on, blinked or flashed, so that the spacing between each activated pair of LEDs indicates the wi... | 03/14/1995 |
| 5388496 | Electronic tuning device An electronic tuning device includes a display with a single row of LED's corresponding to musical notes wherein the sensing of a fundamental frequency of an input tone causes the operation of the corresponding LED to indicate the nearest note. Additional... | 02/14/1995 |
| 5350922 | Underwater light scattering sensor An underwater light scattering sensor includes a light source, light stop and a light detector mounted on a planar support capable of measuring nearly all suspended particle concentrations found in natural waters, 1 μg/l to 3 g/l. The sensor is designed ... | 09/27/1994 |
| 5347579 | Personal computer diary A computer diary archives a diary entry by creating, time stamping, authenticating and permanently storing a reference data block along with each diary entry. An archived diary entry can only be modified by placing original text within compartment codes, ... | 09/13/1994 |
| 5245665 | Method and apparatus for adaptive audio resonant frequency filtering Audio signals are digitized and an FFT is conducted on samples of the digitized signals to produce corresponding frequency spectrums. These spectrums are analyzed, such as by determining one or more peak frequency magnitudes which are 33 dB greater than h... | 09/14/1993 |
| 5207090 | Particle sensor for stream bed A sensor for detecting particle flux in a stream has a hollow armored housing enclosing a vibration transducer coupled to the housing for detecting particles impinging on the housing. Also enclosed in the housing is a data logging and control unit for rec... | 05/04/1993 |
| 5189700 | Devices to (1) supply authenticated time and (2) time stamp and authenticate digital documents A device to provide authenticated time includes a clock and an encryption circuit enclosed by a seal with a controller for producing an encrypted authentication code of the time read for the clock upon request. An authentication device number can be combi... | 02/23/1993 |
| 4049028 | Transition section for a bag filling device and method An improved transition section for a bag filling device is disclosed for use with a bag filling machine. The device comprises a new and novel transition structure that may be utilized to effectively absorb the energy of the material passing through the fi... | 09/20/1977 |
| 4040558 | Combination shipping and storage container and method An improved combination shipping and storage container which comprises an inner container having at least one product receiving cell which is positioned within a removable outer shell which has an open top and an open bottom. The outer shell is removable ... | 08/09/1977 |
| 3995736 | Combination shipping pallet/container An improved combination shipping pallet/container for use in conjunction with either a forklift truck or a jack truck and which comprises an outer structure having a plurality of fork receiving openings contained in the lower portion thereof. An inner pal... | 12/07/1976 |
| 3987892 | Display carton A new and novel display carton for displaying a plurality of uprightly positioned articles within the carton. The display carton is formed in a one-piece construction and has an integral advertising panel formed at the rear portion of the carton with the ... | 10/26/1976 |
