Many patents worldwide are testaments to failed attempts at making these pens commercially viable and widely available.

Many attempts have been made at identifying its origins.

Many lives were lost in futile attempts to charge across the no man's land where these crossfires were set up.

Many of the routes listed below are in poor condition and may be operating at only a fraction of their original capacity ( if at all ), despite recent attempts to make improvements.

There are early mystery novels in which a police force attempts to contend with the type of criminal known in the 1920s as a homicidal maniac, such as a few of the early novels of Philip Macdonald and Ellery Queen's Cat of Many Tails.

Many of these attempts brought him unfavorable criticism from the press and garnered him constant rebukes by his father, who nonetheless provided him with small sums for living expenses.

Many of the largely settled scientific issues, such as the human responsibility for global warming, remain the subject of politically motivated attempts to downplay, dismiss or deny them – a phenomenon widely known as climate change denial.

Many attempts to popularize Western classical music in India have failed in the past due to disinterest and lack of sustained efforts.

Many Indians view the war as a betrayal of India's attempts at establishing a long-standing peace with China and started to question Nehru's usage of the term " Hindi-Chini bhai-bhai " ( meaning " Indians and Chinese are brothers ").

Many low-end entertainment systems have a karaoke mode that attempts to remove the vocal track from regular audio CDs, using an Out Of Phase Stereo ( OOPS ) technique.

Many sonar attempts had been made previously, but most were either inconclusive or negative.

Many attempts were made to adapt the existing systems to have better performance, but the overhead was always considerable and most of these efforts required the user-space programs to be moved back into the kernel.

Many attempts were made to improve the performance of Mach and Mach-like microkernels, but by the mid-1990s much of the early intense interest had died.

Many opera companies have experienced a similar trend, and opera company websites are replete with attempts to attract a younger audience.

Many attempts have been made to derive its value ( currently measured at about 1 / 137. 035999 ) from theory, but so far none have succeeded.

Many attempts were made to imitate it in Italy and France.

Many of the PCC's attempts at organizing peasants, were met with violent repression by the Colombian government, and landowning class.

Many active sabotage attempts were against critical rail lines of transportation.

Many attempts by the ROC to rejoin the UN, in recent years, have not made it past committee, under fierce opposition and threatened vetoes from the PRC.

Many attempts have been made to amend the Constitution to allow Congress to prohibit the desecration of the flag.

Many of his novels and essays abound with experimental word play, lists and attempts at classification, and they are usually tinged with melancholy.

Many attempts have been made to broker a two-state solution, involving the creation of an independent Palestinian state alongside an independent Jewish state or next to the State of Israel ( after Israel's establishment in 1948 ).

Many of the corporate raiders of the 1980s were onetime clients of Michael Milken, whose investment banking firm, Drexel Burnham Lambert helped raise blind pools of capital which corporate raiders could use to make legitimate attempts to take over companies and provide high-yield debt financing of the buyouts.

Many attempts were made to restore the old Mission from the early 20th century, but it was not until the Hearst Foundation gave a large gift of money in the 1940s, that the Mission was finally restored.

Many attempts have been made to group the superfamilies of the Lepidoptera into natural groups, most of which fail because one of the two groups is not monophyletic: Microlepidotera and Macrolepidoptera, Heterocera and Rhopalocera, Jugatae and Frenatae, Monotrysia and Ditrysia.

Many breeders also show their hamsters, so breed towards producing a good, healthy, show hamster with a view to keeping one or two themselves, so quality and temperament are of vital importance when planning the breeding.

Many of the most dangerous species breed in ditches, flowerpots and discarded containers.

Many of these birds breed and nest in the refuge.

Many rare bird species breed in the reeds around the lake.

Many species do in fact breed in the temperate southern hemisphere regions and winter further north in the tropics.

Many species breed in costal colonies, with a preference for islands, and one species, the Grey Gull, breeds in the interior of dry deserts far from water.

Many horse shows host driving competitions for a particular style of driving, breed of horse, or type of vehicle.

Many horses eligible for registration with their own breed registry and are of a particular color are often " double registered " with both organizations, often increasing their sale value by doing so.

Many killifish are lavishly coloured ; and most species are easy to keep and breed in an aquarium.

Many even breed communally, with a dominant pair building a nest, and the remainder helping to defend and rear their young.

Many ( but not all ) species of weavers are gregarious birds that breed colonially.

Many farmers appreciated the breed for their versatility and not for their flash or strict conformation to a standard of appearance.

Many bee breeding companies strive to selectively breed and hybridize varieties to produce desirable qualities: disease and parasite resistance, good honey production, swarming behaviour reduction, prolific breeding, and mild disposition.

Many strains of Hereford have used other cattle breeds to import desired characteristics, and this has led to changes in the breed as a whole.

Many common bird species breed on the spit that can be viewed from the only hide on the lake, the north hide.

Many members of the breed are still well and active at 12 or 14 years of age, and some maintain their sight, hearing and even their teeth until their final days.

Many different types of caciocavallo exist in Italy and several are recognized as Prodotto agroalimentare tradizionale ( traditional regional food product ) like Caciocavallo podolico ( produced using only milk from the Podolica cattle breed ) or Caciocavallo di Godrano ( often called caciocavallo Palermitano ).

Many sea birds breed on the island, including Arctic terns and Arctic skuas.

Many Lake District residents saw the breed as an indispensable icon of the region.

Many people believe that the breed produces less Fel d1, the primary allergen present on cats.

Many species breed in colonies or large communities which is known as communal breeding.

Many of them were pushed out of Britain during the mid-to-late 19th century, sa seen as a threat to the Bulldog breed.

Many GSD fanciers like the white colour and continue to breed for the white coat ; some lobby for its acceptance into the breed standard, others argue for the creation of a new breed.